Yes, he is the author of the "Population Bomb" [1968] and other "We are Doomed" tracts. He is equally famous for an ill-fated (for him) wager with noted conservative Economist/Business Academic Julian L Simon in 1980 about Ehrlich-chosen commodity prices over the next 10 years.
An interesting side-note is that one of Ehrlich's advocates, advisors and judges of this wager was a gent named John Holdren. If that name sounds familiar, he is Obama's current "Science Czar". "By their friends, you shall know them!"
In addition to your note about Julian Simon, it was Simon’s winning of that gentleman’s bet that encouraged a far-left eco-whacko (and former Green Peace leader) named Bjorn Lomborg to re-examine much of the data that environmentalists were using to condemn industrialization.
What he found was that the environmentalists for years have only been telling half the story of their data, that, when you study the complete data, it proves to grand improvements to both the environment and the human condition at-large (better food, better medicine, better homes, better living conditions)...all of this because of industrialization.
He documented his findings in “The Skeptical Environmentalist,” and, for his honesty, he was torn to shreds by his former colleagues. He’s still a lefty, but at least he is painting an honest picture of what is happening in the environment and that industrialization is not an enemy, but a friend, provided there is competition, of course (China’s industrialization is a disgrace because the government gives carte blanche and eliminates competition).