Why is this guy the "Science Czar"?

Obama's Science Czar Considered Forced Abortions, Sterilization as Population Growth Solutions

The three authors summarize their guiding principle in a single sentence: "To provide a high quality of life for all, there must be fewer people."

"The 1,000-page course book, which was co-written with environmental activists Paul and Anne Ehrlich, discusses and in one passage seems to advocate totalitarian measures to curb population growth, which it says could cause an environmental catastrophe."

"To help achieve those goals, they formulate a "world government scheme" they call the Planetary Regime, which would administer the world's resources and human growth, and they discuss the development of an "armed international organization, a global analogue of a police force" to which nations would surrender part of their sovereignty."
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"Vitter grilled Holdren during the hearing, asking him to clear up his 1986 prediction that global warming was going to kill about 1 billion people by 2020.

"You would still say," Vitter asked, "that 1 billion people lost by 2020 is still a possibility?"

"It is a possibility, and one we should work energetically to avoid," Holdren replied."