NASA and the National Oceanic and Atmospheric Administration agree to the fact the human induced global warming is real and poses risk to humanity. However, many people in the US are still of the belief, despite scientific evidence, that climate change is not true.
About 97% of scientists around the world support NASA and NOAA on climate change opinions. Scientists have showed that carbon dioxide is a greenhouse gas that traps the sun's heat on the earth. Increased use of fossils fuels to produce energy is releasing tons of carbon dioxide into air every day.
About 400 carbon dioxide parts-per-million exist in atmosphere right now compared to earth's safety limit of 350-ppm. Scientists have warned that at that level natural cycles will begin to occur out of control to cause rising sea levels, more frequent, hostile weather, melting glaciers and acidic oceans. This will make it extremely difficult for human beings to ensure their survival.
Although scientists have proved that safety threshold for carbon dioxide in the air has been crossed, but it does not mean that things can't be improved and levels of carbon dioxide in the atmosphere can't be reversed. However, it would require a significant, quick change in the way energy is used and decline in use of fossil fuels like oil, coal and natural gas. Renewable sources like solar, wind and geothermal will require a boost through increased investments and transition.
These goals can only be achieved by active participation of governments all over the world. President Obama realizes his responsibility and he is doing everything he can do without Congress' approval to mitigate climate change.
Senate Democrats have also decided to bring the attention on the issue to save humanity from threatening effects of climate change.
Drew Shindell, a climatologist at NASA's Goddard Institute for Space Studies in New York, said the earth is likely to experience 20% more warming that what has been estimated by studies based on surface temperature observations during the past 150 years.
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