NASA News on Human Climate Change September 11, 2008 5:23 AM
Earth Impacts Linked to Human-Caused Climate Change
"Humans are influencing climate through increasing greenhouse gas emissions and the warming is causing impacts on physical and biological systems that are now attributable at the global scale and in North America, Europe, and Asia," said Rosenzweig.
main human activities that contribute to global warming are the burning of fossil fuels (coal, oil, and natural gas) and the clearing of land. Most of the burning occurs in automobiles, in factories, and in electric power plants
Burning fossil fuels accounts for 80 percent of the rise of atmospheric CO2 in industrial times. Now NASA researchers Pushker Kharecha and James Hansen show that CO2 can be kept below harmful levels as long as emissions from coal are phased out within the next few decades. In other words, we can burn all the oil and gas that's left on Earth and still avoid really dangerous climate change.
NASA says Bush Administration... September 14, 2008 7:40 AM
The top climate scientist at NASA says the Bush administration has tried to stop him from speaking out since he gave a lecture last month calling for prompt reductions in emissions of greenhouse gases linked to global warming.