RACHELLE DEJONG: What I Learned in a Sustainability MOOC.

That the environment might be resilient and humans might be innovative in finding new ways to replace nonrenewable resources faded in comparison with the imminent doom-of-the-commons tragedies, species extinction, and the impending threat of famine. Neo-Malthusianism, I found, is alive and kicking, despite two centuries of evidence to cast its predictions in a doubtful light. . . .

The title of week 4 declares that the question of global warming is one of degree, not of reality: “The climate of the near future: hot, hotter, or hottest?”

Such confidence stems from a “scientific consensus” among researchers who believe, but have no conclusive evidence for, the existence of continued global warming.

Wait. People pay for this? Don’t we hear this stuff all the time anyway?