US heavyweights unite to establish economic cost of climate change
Michael Bloomberg, Tom Steyer and Hank Paulson have teamed up to put a price tag on the climate impacts in the US
Tom Steyer
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Obama fundraiser targets Keystone pipeline in TV campaign
TV ads funded by billionaire Tom Steyer rebut claims Keystone XL will boost US economy and generate jobs
US billionaire Tom Steyer to spend $100m on climate change campaign
American philanthropist to use personal wealth in ad campaign against climate sceptics in midterm elections