Notícias e actualidades
Aquecimento global
- Bricoleiro
- 8 fevereiro 2019
Colocado por: branco.valter
O clima muda ao longo de muitos anos de uma forma mais ou menos constante, nada como se vê desde o principio da revolução industrial. É uma mudança rápida e cada vez mais acelerada.
Sério?
Só veem o que interessa...
Tente aqui:
https://pt.wikipedia.org/wiki/Dryas_recente
Também foi da industrialização? Acho que se calhar foi mesmo dos peidos dos mamutes que no período frio denominado Dryas Recente, as temperaturas atmosféricas caíram cerca de 8Cº em menos de 50 anos e logo depois dele voltaram a subir na mesma proporção em pouco mais de meio século.Colocado por: BricoleiroAcho que se calhar foi mesmo dos peidos dos mamutes
Então.....isso é publicidade paga :)- Bricoleiro
- 8 fevereiro 2019
Colocado por: Wardruna
Então.....isso é publicidade paga :)
Não me ocorre outra explicação para quem não quer ver o que é.Colocado por: JoelMA teoria actualmente dominante diz...
hummm...teoria, o que que será uma teoria? Alguém me explica?
Acho que há uma teoria que associa o dryas recente ao impacto de um meteoro....hummmmm
Eu fico-me pelo peido dos mamutes mas confesso que a do meteoro também me agrada, afinal no meio de tantas cada um é livre de escolhar a que quer.
Eles comem tudo...eles comem tudo.......eles comem tudo e não escolhem nada!!!- Bricoleiro
- 8 fevereiro 2019
Daqui a nada estão na teoria do Big Bang...Colocado por: JoelMEu sei que é complicado para vocês chegarem lá...
Não há pasto para todos, vocês comem tudo e depois a fraqueza instala-se!Colocado por: JoelM
Quotou a pessoa errada, o texto é do artigo que o bricoleiro considera fidedigno.
Não lê depois da nisso...
Eu li,..e? o que é que isso tem a ver para o caso?
teorias....- Bricoleiro
- 8 fevereiro 2019
Colocado por: JoelMEu sei que é complicado para vocês chegarem lá, mas se virem com atenção todo o meu posto está entre aspas, apenas citei o artigo que bricoleiro colocou aqui! É bom ver que ele próprio o critica...
Não vale mesmo a pena, porque você só vê dúvidas no outro lado da barreira, a ideia era mesmo essa, fazê-lo pensar um bocadinho mas não vale a pena!
Os estudos que você adora ganham repercussão devido à promoção de um alarmismo sensacionalista e desorientador, mesmo assim são isentos de dúvidas. As outras teses com provas do passado não interessam a ninguém, só mesmo às criaturas que não gostam de bóinas com palas.- Bricoleiro
- 8 fevereiro 2019
Colocado por: JoelMNão tem de se dirigir a mim, o Wardruna é que não acredita na teoria que você postou.
Ó homem, você acredita na bílbia?
Pois... foi à muitos anos não é? Eu também não sei... daí que se chamem teorias. A questão é, porquê que acha que as teorias de alguns cientistas pseudo-modernos que afirmam que as alterações climáticas são origem de actividade humana são claras como água e ignora outros cientistas e provas que se regem pelo que aconteceu desde à muito atrás na Terra(desde que há registo)?-
Sergio Rodrigues
- 8 fevereiro 2019
A teoria da gravidade também é só uma teoria?- J.Fernandes
- 9 fevereiro 2019
Colocado por: Sergio RodriguesA teoria da gravidade também é só uma teoria?
Qual é a analogia entre isso e quem defende a ação humana como responsável pelas alterações climáticas?
Nesta questão deveria haver um pouco mais de humildade de reconhecer que é mais o que não se sabe que o que se sabe. Não sou de maneira nenhuma um negacionista, mas quando se cria uma espécie de religião oficial e quem não a segue é logo rotulado de herege, é bom que usemos de alguma cepticismo "científico".- branco.valter
- 9 fevereiro 2019 editado
There’s now an official Green New Deal. Here’s what’s in it.
A close look at the fights it picks and the fights it avoids.
By David Roberts:format(webp)/cdn.vox-cdn.com/uploads/chorus_image/image/63012639/1128057909.jpg.1549564600.jpg)
Markey and Ocasio-Cortez hold a news conference to unveil their Green New Deal resolution.
The Green New Deal has become an incredibly hot item on the political agenda, but to date, it has remained somewhat ill defined. It’s a broad enough concept that everyone can read their aspirations into it, which has been part of its strength, but it has also left discussion in something of a fog, since no one’s quite sure what they’re arguing about.
On Thursday, Sen. Ed Markey (D-MA) and Rep. Alexandria Ocasio-Cortez (D-NY) introduced a Green New Deal resolution that lays out the goals, aspirations, and specifics of the program in a more definitive way. This is as close as there is to an “official” Green New Deal — at last, something to argue about.
There will be lots to say in the days to come about the politics of all this. (In the meantime, read Ella Nilsen’s piece.) For instance, it is interesting that Markey, a living symbol of 2008-era Democratic thinking on climate change (and the leader of the old climate committee), is lending his imprimatur to this more urgent and radical iteration.
But for now, I just want to share a few initial impressions after reading through the short document a few times.
It’s worth noting just what a high-wire act the authors of this resolution are attempting. It has to offer enough specifics to give it real shape and ambition, without overprescribing solutions or prejudging differences over secondary questions. It has to please a diverse range of interest groups, from environmental justice to labor to climate, without alienating any of them. It has to stand up to intense scrutiny (much of it sure to be bad faith), with lots of people gunning for it from both the right and center.
And, of course, it eventually has to give birth to real legislation.
Given all those demands, the resolution does a remarkably good job of threading the needle. It is bold and unmistakably progressive, matched to the problem as defined by the Intergovernmental Panel on Climate Change, while avoiding a few needless fights and leaving room for plenty of debate over priorities and policy tools.
The resolution consists of a preamble, five goals, 14 projects, and 15 requirements. The preamble establishes that there are two crises, a climate crisis and an economic crisis of wage stagnation and growing inequality, and that the GND can address both.
The goals — achieving net-zero greenhouse gas emissions, creating jobs, providing for a just transition, securing clean air and water — are broadly popular. The projects — things like decarbonizing electricity, transportation, and industry, restoring ecosystems, upgrading buildings and electricity grids — are necessary and sensible (if also extremely ambitious).
There are a few items down in the requirements that might raise red flags (more on those later), but given the long road ahead, there will be plenty of time to sort them out. Overall, this is about as strong an opening bid as anyone could have asked for.
Now let’s take a closer look.
The Green New Deal resolution features 2 big progressive priorities
From a progressive point of view, the discussion over climate change in the US has always been overly skewed toward technologies and markets. (The term of art is “neoliberalism.”)
I have been guilty of this myself. Economics and technology are considered serious topics in the US, a ticket to being heard and acknowledged by the political mainstream, and there is a subtle, tidal pressure to hew to those subjects, at risk of being relegated to the status of activist or, worse yet, ideologue. (As though neoliberalism is not an ideology.)
The resurgent left is done with all that.
It’s not that there’s anything wrong with technologies or markets, as long as they remain servants, not masters. It’s just that in the US, those subjects have tended to occlude deeper and more urgent considerations (like justice) and exclude a wide range of policy instruments (like public investment).
It is for the progressive movement to stand up for those priorities, and that’s what the GND resolution does. We’ll take them in turn.
1) Justice
Ordinary people matter. Emissions matter, yes. Costs and money matter. Technologies and policies matter. But they all matter secondarily, via their effects on ordinary people. The role of progressive politics, if it amounts to anything, is to center the safety, health, and dignity of ordinary people.
That means that justice — or as it’s often called, “environmental justice,” as though it’s some boutique subgenre — must be at the heart of any plan to address climate change. The simple fact is that climate change will hit what the resolution calls “frontline and vulnerable communities” (who have contributed least to the problem) hardest. And attempts to transition away from fossil fuels threaten communities that remain tied to the fossil fuel economy.
Frontline and vulnerable communities stand to get it coming and going, from the problem and from the solutions. And unlike big energy companies pursuing growth, unlike idle billionaires fascinated with new tech, unlike banks and financial institutions seeking out new income streams, unlike incumbent industries fat from decades of subsidies, frontline and vulnerable communities do not have the means to fund campaigns and hire expensive lobbyists. They do not have the means to make their voice heard in the scrum of politics.
That’s why progressives exist: to amplify the voices of those without power (a class that includes future generations).
Accordingly, in the resolution’s preamble — the part with all the whereas this and whereas that — there are three statements focused on climate damages and emissions and four focused, in one way or another, on justice.
Of the resolution’s five goals, three are focused on justice. (For example: “promote justice and equity by stopping current, preventing future, and repairing historic oppression to frontline and vulnerable communities.”)
Of the 12 GND projects, three, including the very first, are focused on community-level resilience and development. And something like two-thirds of the GND requirements, depending on how you count, direct political power and public investment down to the state, local, and worker level, safeguarding environmental and labor standards and prioritizing family-wage jobs.
The resolution makes clear that justice is a top progressive priority. It is fashionable for centrists and some climate wonks to dismiss things like wage standards as tertiary, a way of piggybacking liberal goals onto the climate fight. But progressives don’t see it that way. In a period of massive, rapid disruption, the welfare of the people involved is not tertiary.
2) Investment
Neoliberalism has also made old-fashioned public investment something of a taboo. The GND goes directly at it — public investment aimed at creating jobs is central to the project.
The preamble notes that “the Federal Government-led mobilizations during World War II and the New Deal era created the greatest middle class that the US has ever seen” and frames the GND as “a historic opportunity to create millions of good, high-wage jobs in the United States.”
Creating jobs is the second of the five goals; investment in “US infrastructure and industry” is the third. Of the GND projects, investment in “community-defined projects and strategies” to increase resilience is the first; repairing and upgrading infrastructure is the second.
Of the GND requirements, the very first is “providing and leveraging, in a way that ensures that the public receives appropriate ownership stakes and returns on investment, adequate capital (including through community grants, public banks, and other public financing), technical expertise, supporting policies, and other forms of assistance to communities, organizations, Federal, State, and local government agencies, and businesses working on the Green New Deal mobilization.”
Also in the requirements: funding education and job training for frontline communities in transition; investing in research and development; and investing in community ownership and resilience.
[size=140]The Green New Deal resolution smartly avoids a few fights[/size]
There some internecine fights within the broad community of climate hawks that are best left to other venues, in order to keep the coalition behind a GND as broad and small-c catholic as possible. This resolution deftly avoids several of those fights.
1) Paying for it
The question of how to pay for the many public investments called for in the GND is still a bit of a political minefield. There are centrist Democrats who still believe in the old PAYGO rules, keeping a “balanced budget” within a 10-year window. There are Democrats who think deficit fears have been exaggerated and there’s nothing wrong with running a deficit to drive an economic transition. And there are Democrats who have gone full Modern Monetary Theory, which is way too complicated to explain here but amounts to the notion that, short of inflation, the level of the deficit is effectively irrelevant, as long as we’re getting the economy we want.
That discussion is just getting underway, and the better part of valor is to do what the GND resolution does: say nothing about it. Leave it for later.
2) Clean versus renewable energy
Many, probably most, climate hawks would prefer a future in which all electricity is provided by renewable energy. (I am among them.) But there is good-faith disagreement about whether 100 percent renewables is realistic or economical in the 10-year time frame.
Many, probably most energy analysts believe that renewables will need to be supplemented with nuclear power or fossil fuels with carbon capture and sequestration (CCS), but some lefty environmental groups pushed for the GND to explicitly prohibit them.
As I argued earlier, that would have caused a completely unnecessary fight. The resolution wisely avoids taking that route.
Instead, it calls for the US to “meet 100 percent of our power demand through clean, renewable, and zero-emission energy sources.”
Easy. Now renewables advocates can go right on advocating for renewables, nuclear fans can go right on advocating for nuclear, and they can continue fighting it out on Twitter. But their fight doesn’t need to muck up the GND. The GND targets carbon emissions, which is the right target for a broad programmatic outline.
3) Carbon pricing
Carbon pricing — carbon taxes or cap-and-trade systems — is also the source of much agita within the climate hawk community. The need to price carbon has practically been climate orthodoxy for the past few decades, but lately there’s been something of a lefty backlash.
Some have taken the (sensible) position that climate pricing has been rather fetishized, that it may not be the smartest political priority in all cases, and that other policy instruments with more proven records are equally important. Some have taken the (silly) position that carbon pricing is bad or counterproductive in and of itself and pushed to have it excluded from the GND.
The resolution doesn’t take a position. It merely says that the GND must involve “accounting for the true cost of emissions.” If you’re a carbon pricing fan (as I am), you can read pricing into that. But there are other ways to read it too.
Pricing advocates probably would have liked something a little more muscular there, but in the end, I think the instinct — to avoid the fight entirely — is the right one. The struggle over how or whether to prioritize pricing instruments can come later; it doesn’t need to be settled in advance of getting people on board with the GND.
4) Supply-side policy
Lately, lots of climate activists have been pushing to directly restrict the supply and distribution of fossil fuels — at the mine, well, or import terminal — with an eye toward phasing out fossil fuels entirely. “Keep it in the ground,” as the slogan goes.
This is the leading edge of the climate fight, out ahead of where labor and most moderates are. Including it in the GND probably would have sparked some defections.
The GND resolution doesn’t touch the subject, other than calling for transition assistance for communities losing fossil fuel jobs. And it calls on the US to “achieve net-zero greenhouse gas emissions,” which theoretically allows for some fossil fuel combustion coupled with carbon removal.
The keep-it-in-the-ground crowd is in the same position as the all-renewables crowd: They may feel some initial disappointment that their perspective was not reflected in the resolution, but they can take comfort in the fact that it was not excluded either. The resolution simply slates that fight as something to take place within the broad GND coalition, rather than making it part of the price of membership.
All four of these omissions or elisions — these fights postponed — signal, to me, a movement that is capable of reining in its more vigorous ideological impulses in the name of building the broadest possible left coalition behind an ambitious climate solution. That bodes well.
The Green New Deal resolution omits a few key, wonky policies
There are a few things I would have liked to see feature more prominently in the resolution. They are somewhat nerdy, but important in climate policy.
1) Density and public space
Just about the only urban-focused element of the GND resolution is tucked into the transportation section, calling for “investment in zero-emission vehicle infrastructure and manufacturing, clean, affordable, and accessible public transit, and high-speed rail.”
That’s it. Boo.
Creating dense urban areas with ample public spaces and multimodal transportation options — deprioritizing private automobiles and reducing overall automobile traffic — serves multiple progressive goals.
It tackles the next big climate challenge, which is cars. It reduces urban air pollution, urban noise, and the urban heat island effect, while increasing physical activity and social contact, all of which improves the physical and psychological health of urban communities.
It addresses the housing crisis that is crippling many growing cities, pricing young people, poor people, students, and longtime residents out of walkable urban cores.
And, if you will forgive some dreamy speculation, a little more public space might just generate a sense of community and social solidarity to counteract the segregation, atomization, isolation, and mutual distrust that cars and suburbs have exacerbated.
I get that GND proponents are spooked about being seen as anti-rural, which is why these kinds of plans from the left always include education, training, and transition assistance for rural communities hurt by decarbonization.
And that’s great. But they should also remember that their core demographics live in cities and are engaged in urban issues. Cities are central to any vision of 21st-century sustainability. They deserve pride of place in a GND.
2) Electrification
It is widely acknowledged in the climate policy community that deep decarbonization will involve rapid and substantial electrification. We know how to decarbonize electricity grids — so we need to get everything we can onto the grid.
That means two big things in particular.
First, the US vehicle fleet needs to be electrified as fast as practicably possible. The resolution’s “investment in zero-emission vehicle infrastructure” hints at this, but scarcely conveys the needed scale and speed.
Second, the millions upon millions of buildings in the US that use natural gas for heat need to find a zero-carbon alternative, and quickly. There are some zero-carbon liquid substitute fuels on the horizon, but for the time being, the best way we know to decarbonize HVAC (heating, ventilation, and cooling) is to rip out all those millions of furnaces and replace them with electric heat pumps. That’s a big, big job that will create a ton of work and directly involve millions of people’s homes and businesses.
The GND resolution would “upgrade all existing U.S. buildings and build new buildings, to achieve maximal energy efficiency, water efficiency, safety, affordability, comfort, and durability.” Theoretically that could imply electrification, but I’d like to see it called out.
The Green New Deal resolution has a few, er, aspirational inclusions
As I said, most of the resolution consists of goals and policies that anyone who takes climate change seriously will find necessary. But down toward the bottom of the list of projects, the resolution really lets its hair down and gets funky. Readers who make it that far into the document will find some eyebrow-raising doozies.
Like No. 8: “guaranteeing a job with a family-sustaining wage, adequate family and disability leave, paid vacations, and retirement security to all people of the United States.” Heyo! There’s that job guarantee.
Or No. 9: “strengthening and protecting the right of all workers to organize, unionize, and collectively bargain free of coercion, intimidation, and harassment.” A full-on right to unionize, okay.
11: “enacting and enforcing trade rules, procurement standards, and border adjustments with strong labor and environmental protections to stop the transfer of jobs and pollution overseas and to grow domestic manufacturing in the United States.” And there’s a liberal trade regime.
14: “ensuring a commercial environment where every businessperson is free from unfair competition and domination by domestic or international monopolies.” All right, we’re going after monopolies too.
And just to fill in the remaining gaps, 15: “providing all members of society with high-quality health care, affordable, safe and adequate housing, economic security, and access to clean water, air, healthy and affordable food, and nature.” That is quite the addendum!
If you’re keeping score at home, the Green New Deal now involves a federal job guarantee, the right to unionize, liberal trade and monopoly policies, and universal housing and health care.
Starting strong, bargaining down
This is just a resolution, not legislation. (I’m pretty sure providing universal housing and health care would require a couple of bills at least.) So I’m not really sure how literally these latter requirements are meant to be read, or how literally those who sign on to the GND will take them.
If they’re taken literally, then everyone who signs on should get a welcome letter from the Democratic Socialists of America. If they are taken as an aspirational list of Good Things, as I suspect they will be (especially given Markey’s involvement), then many arguments will remain to be had about just what a GND endorsement means.
But it definitely means something.
“The Green New Deal is what it means to be progressive. Clean air, clean water, decarbonizing, green jobs, a just transition, and environmental justice are what it means to a progressive,” Sean McElwee said. He’s the director of Data Progress, a young think tank whose work has substantially informed the GND. “By definition that means politicians who don’t support those goals aren’t progressive. We need to hold that line. Get on the GND train or choo-choo, motherfucker, we’re going to go right past you.”
Choo-choo, indeed. As I said in my first post on the Sunrise Movement protest that got the GND train rolling, I think it is all to the good that a muscular progressive movement is rallying behind a program shaped by the problem at hand rather than speculation about what is politically possible. It is good to start from a position of strength.
And just to be clear, I’m a big fan of universal housing and health care. But at some point, we have to grapple with the fact that a solution to climate change will require the support of people who may not be ready to join the democratic socialist revolution.
Given the two-year time window to get legislation ready and the 10-year time window to kickstart multiple decarbonization revolutions, the chances of pulling off a full-scale political revolution beforehand seem remote.
So there will be a lot of bargaining ahead and some of the dreamier GND requirements will go overboard for the time being. Perhaps universal health care will have to be tackled separately.
But take a step back and appreciate: The progressive movement has, in rather short order, thrust into mainstream US politics a program to address climate change that is wildly more ambitious than anything the Democratic Party was talking about even two years ago. One hundred percent clean energy, investment in new jobs, and a just transition have gone from activist dreams to the core of the Democratic agenda in the blink of a political eye. There’s a long way to go, but the GND train has come farther, faster than anyone could have predicted.
“We are going to transition this country into the future and we are not going to be dragged behind by our past,” Ocasio-Cortez said at the press conference Thursday.
With Trump and his attendant chaos, US politics is more disrupted, uncertain, and malleable than it’s been in my adult lifetime. Everything is up for grabs. The forces of ethnonationalism and fossil fuel myopia sense this malleability and are organizing to drag the country backward. But the malleability can serve a humane progressive agenda as well; progressives just have to organize better.
The map has been drawn, the path laid out. Now it’s on.
https://www.vox.com/energy-and-environment/2019/2/7/18211709/green-new-deal-resolution-alexandria-ocasio-cortez-markey- Bricoleiro
- 11 fevereiro 2019
Colocado por: JoelM
onde é que eu duvidei ou pus em causa o link que colocou aqui?
eu fiz quote do comentário da pessoa que duvidou do que você colocou e mesmo assim dirige-se a mim?
Não percebi o quote! Se me enganei peço desculpa.
O que lhe gostava de perguntar é porque é que confia plenamente em quem afirma ter certezas da ação humana como causa das alterações climáticas e desconfia de quem mete isso em causa por já não ser novidade nenhuma, tendo já havido à muitos anos atrás também alterações climáticas não menos acentuadas que as de agora?Colocado por: J.Fernandesé mais o que não se sabe que o que se sabe
Será mesmo?- branco.valter
- 11 fevereiro 2019
Para TODOS verem com atenção:
https://www.youtube.com/watch?v=sZB1YtQtHjE- branco.valter
- 11 fevereiro 2019
Outro video feito para as pessoas pensarem!
https://www.youtube.com/watch?v=9uXsXetHMew-
Sergio Rodrigues
- 11 fevereiro 2019 editado
Esse Richard Dawkins é um génio. O livro dele "O Gene Egoísta", coloca em perspetiva aquilo que nós, seres humanos, realmente somos.- J.Fernandes
- 11 fevereiro 2019
Colocado por: euSerá mesmo?
É. E é assim em muitos outros problemas da ciência.-
Sergio Rodrigues
- 11 fevereiro 2019
Sim e o livro mais (polémico) dele o the God desolusion, ele nesse aspecto é fera, há um programa em que ele visita uma escola religiosa que deveria também ensinar ciencias no Reino unido, as conclusões são preocupantes0.1244 seg. NEW