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Top NASA climate scientist Dr. James hansen writes to British Prime Minister

Scientific Group Releases New Statement on Climate Change  

AGU issues statement on global warming. The world’s largest society of Earth and space scientists, the American Geophysical Union (AGU), has released a statement that identifies human activity as the unequivocal cause of global warming. Bette Otto-Bliesner of the National Center for Atmospheric Research stated, “The facts are well-established now that the Earth's climate is warming, and that these climate changes are “best explained…by human activity during the 20th century.
 
The AGU scientists have called for a 50% reduction of green house gas emissions by the end of the century to avoid further natural disasters. We are grateful AGU for your call to immediate action in halting climate change to preserve precious lives and the environment. May the world’s citizens unite in our responsibility as good stewards of our Earth.