Sentences with phrase «posed by carbon dioxide»

The problems posed by carbon dioxide do not reflect these natural processes, but rather human activities, of which the most notable are fossil fuel burning and deforestation.

In an interview with Time Magazine last week, Pruitt said he planned to model his red - team, blue - team debate on Cold War - era discussions of the Soviet nuclear threat and suggested that he believed his agency did not «engage in a robust, meaningful discussion» about the threat posed by carbon dioxide before adopting the endangerment finding.

We are concerned about the effect of methane and black carbon primarily because they are exacerbating the threats posed by carbon dioxide.

Such geoengineering methods «might be able to address some of the climate effects of carbon dioxide but they don't fundamentally address the chemical effects posed by carbon dioxide,» Caldeira said.

Not exact matches

Healthy, intact natural systems provide many benefits to the challenges posed by climate change, from forests that sequester and store carbon dioxide to wetlands that act as natural flood absorbers.

Pioneering new research, carried out by the Universities of Exeter, Zurich, Stanford and Chicago, shows that existing studies have massively under - valued the risk that ongoing carbon dioxide emissions pose of triggering damaging tipping points.

Changing living conditions caused by climate change or ocean acidification — the decrease of ocean pH due to the uptake of human - induced carbon dioxide from the atmosphere — pose serious threats to marine organisms.

Finally, to revisit the question originally posed @ 203: Assuming the IEO2011 Reference case of «1 trillion metric tons of additional cumulative energy - related carbon dioxide emissions between 2009 and 2035», and given that this case equates to following RCP8.5 until 2035 as previously demonstrated @ 408, what increase in average global surface temperature relative to pre-industrial would result by 2035?

If we eliminated emissions of methane and black carbon, but did nothing about carbon dioxide we would have delayed but not significantly reduced long - term threats posed by climate change.

In contrast, if we eliminated carbon dioxide emissions but did nothing about methane and black carbon emissions, threats posed by long - term climate change would be markedly reduced.

So it's utterly unremarkable to find 49 people, including astronauts and engineers, who would publicly reject James Hansen's view of the dangers posed by unabated emissions of carbon dioxide, or the Obama administration's approach to the space agency's research programs, news releases and other forms of public output on climate, which is markedly different than that of the last Bush administration.

There's plenty more, including a great question about making climate - friendly fuels using carbon dioxide captured from air, posed by 14 - year - old Benji Fields (the son of a friend).

HERE is a poll by the IGM of their Economic Experts Panel on a carbon tax; the question posed was: «A tax on the carbon content of fuels would be a less expensive way to reduce carbon - dioxide emissions than would a collection of policies such as «corporate average fuel economy» requirements for automobiles».

He also directed attention to a report by Dr. Arthur Robinson, which concluded that carbon dioxide posed no threat to climate.

Complaints focus on the environmental impacts of mountaintop removal mining, the projected high costs of carbon capture and storage, the human health dangers of large, rapid releases of carbon dioxide, the global warming risk posed by small levels leakage over long periods, increases in coal mining needed to run scrubbers as well as carbon capture and storage systems.

Other experts say there is no time for nuance, given the general lack of public response to the threat posed particularly by carbon dioxide, a by - product of fossil fuels and forests that persists for a century or more in the air and is accumulating rapidly in the atmosphere and changing the pH of the oceans.

The publicâ $ ™ s waning interest in global warming poses a challenge for Mr. Obama, who emphasized climate change throughout his campaign and pledged to seek a cap on emissions in the United States of heat - trapping gases, led by carbon dioxide, which come mainly from burning coal and oil.

The regulations will emerge after years of activism and scientific studies on the climate risk posed by methane, a powerful greenhouse gas that's dozens of times more potent that carbon dioxide.

«With the challenges posed by climate change there has been a new approach to fix increased carbon dioxide in the atmosphere.

In other words: Proposed strategies to alter the amount of sunlight hitting the Earth's surface by (for example) deliberately injecting millions of tons of sulfate aerosols into the stratosphere pose enormous risks and uncertainties and don «t address the underlying causes of global warming or other major risks from rising concentrations of carbon dioxide, such as ocean acidification.

Easterbrook criticized Gore's claims that the melting of ice sheets in Greenland and Antarctica could lead to substantial increases in sea levels, that the concentration of carbon dioxide in the atmosphere is increasing, and that Bush administration officials have attempted to tamper with official reports on the threat posed by climate change.

In his latest book, «The Revenge of Gaia: Why the Earth Is Fighting Back — and How We Can Still Save Humanity» (Perseus, 2006), Dr. Lovelock says that any risks posed by nuclear power are small when compared with the «fever» of heat - trapping carbon dioxide produced by burning coal, oil and other fossil fuels.