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Musk, Branson and sustainability's 10 biggest billionare benefactors

There are those that have fallen from grace, like George Soros' recent coal investments, Vinod Khosla's privatization of a public beach.

1. Richard Branson

2. Tom Steyer

3. Elon Musk

4. Hawaii guy

5. Jeff Skoll

6. Michael Bloomberg

7. Bill Gates

8. Jessica Alba

9. Dean Kamen

10. Tom Siebel

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