... to reach ambitious goals to limit greenhouse gas concentrations by the end of the 21st century, the combined ... will affect costs. In addition, if the world's largest greenhouse gas emitters do not take any ...
... how the climate system has been affected by volcanic activity, the variability of solar energy, changes in greenhouse gas concentrations and the dust and aerosols in the atmosphere that affect ...
... now provide a reasonable view of greenhouse gas concentrations as much as 800,000 years into the past, and are further confirming the link between greenhouse gas levels and global warming, scientists ...
... carbon dioxide from the atmosphere," said Bonan. "This helps mitigate global warming by lowering greenhouse gas concentrations in the atmosphere. These forests also pump moisture ...
... height of the Rocky Mountains, changes in the Earth's orbit, and natural changes in atmospheric greenhouse gas concentrations. Using state-of-the-art computer climate ...
... -offs between air pollution abatement and mitigation of greenhouse gas emissions." In their analysis, Ramanathan and co ... , assumed a highly optimistic scenario that greenhouse gas concentrations would remain constant at 2005 ...
... of our current climate change. Temperatures and greenhouse gas concentrations over up to the last 800,000 years ... . The results have shown that the recent rise in greenhouse gas concentration is beyond any historical comparison ...
... of increase in average global temperatures due to greenhouse gas emissions could cause significant problems ... States has ratified, calls for "stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent ...
... to climate change, but it could help lower greenhouse gas concentrations, provide options for reducing specific ... is unlikely to alleviate all of the serious impacts from increasing greenhouse gas emissions. Still, the threat of climate ...
... are not. Despite decades of effort, scientists do not know precisely what temperatures or greenhouse gas concentrations in the atmosphere constitute a danger ...
... should be taken into account when defining targets for the long-term stabilisation of atmospheric greenhouse-gas concentrations". Lunt added: "This study has shown ...
... past changes, and then look forward and project future changes at higher greenhouse gas concentrations." Wine and corn production A complicating ...
... to icehouse conditions resulted from decreasing greenhouse gas concentrations and changes in Earth's orbit," said Dr ... ," said Dr Harding: "Because carbon dioxide is a greenhouse gas, this may have contributed to declining global temperatures ...
... to a regional temperature increase, and has tied the temperature increase very strongly to increases in greenhouse gas concentrations caused by humans," says Professor Karoly ...
... already within the atmosphere would continue to trap heat. For cooling to occur, greenhouse gas concentrations would need to be reduced. "We wanted ...
