I don’t think it’s exaggerating to call Jeffrey Sachs a moral hero. He’s one of the world’s most influential public intellectuals, and has spent his life pursuing innovative ways to reduce poverty, hunger, and suffering through sustainable development.

In Time magazine, Sachs issues a clear and forceful call for action on global warming. He directs readers to NextGenerationEarth.org — created by The Earth Institute at Columbia University, which Sachs runs. There, you can … add your name to a petition. Sigh.