It’s hard to understand why Al Gore is so adamant about the threat of man-made global warming.

But this Newsweek article offers at least one reason anyone should comprehend:

If Gore’s profit-sharing deal is anything like the firm’s other 23
partners, he’s also in line to collect tens of millions of dollars a
year. That’s because partners carve up 30 percent of the profits if and
when the alternative-energy start-ups that KP supports go public or are
sold. (Kleiner Perkins declined to comment on Gore’s compensation, but
his communications director, Kalee Kreider, confirmed that he plans to
donate only his “guaranteed income” to charity.) Should Gore’s
prospecting unearth a clean-energy gold mine the size of Google?which
earned billions for KP partners?his share of the loot could make him
U.S. history’s richest ex-veep.