Views he earlier seemed to espouse in the rather alarmist book Ecoscience which he co-authored.

‘Don’t read that book,’ he says in his confirmation hearings, or at least, ‘don’t read my views into it’ (though, there they are).

The office of President Obama’s “science czar” John
Holdren has responded to concerns Holdren co-authored a book which
allegedly contained comments supporting coercive population control
measures. A spokesman for the department said that Holdren disavowed
such policies at his confirmation hearing.

Holdren is currently Director of the White House Office of Science
and Technology Policy, Assistant to the President for Science and
Technology, and Co-Chair of the President’s Council of Advisors on
Science and Technology.

In 1977, he co-authored the 1,000 page book “Ecoscience” with Paul
and Anne Ehrlich. The book included several descriptions of possible
population control measures, including the addition of “sterilants” to
the water supply to prevent human conception.

One section, titled “Population Law,” cited the radical group Zero
Population Growth and said “it has been concluded that compulsory
population-control laws, even including laws requiring compulsory
abortion, could be sustained under the existing Constitution if the
population crisis became sufficiently severe to endanger the society.”

And look who’s going to make those determinations and advise the president on that.

By the way….there’s this other issue of all these czars.