OCCUPATION: Co-founder of Sun Microsystems, biofuel venture capitalist
NUMBER OF TIME COVERS: 0
PREVIOUS APPEARANCES ON THE TIME 100: 0
PRO: His massive, vanguard investment in green tech pushed former partners at leading venture capital firm Kleiner Perkins Caufield & Byers to invest more than $270 million in the sector and hire Nobel Prizewinner Al Gore as an active partner.
CON: A team from Brazil's Labor Ministry found "degrading" living conditions for 133 sugarcane workers employed by Brenco, an ethanol company whose investors include former President Clinton and Khosla.
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