The NorthStar Initiative for Sustainable Enterprise is launching a free quarterly webinar series aimed at identifying new challenges and opportunities for advancing corporate sustainability through research. The first webinar, “Procurement in Sustainability: From Buying Green Products to Creating Green Solutions,” will be held Tues., Feb. 21, 1–2 p.m. CST.

What would it take to shape a more sustainable planet? Check out the Winter 2012 special issue of Momentum magazine for insights from M. Sanjayan, Peggy Liu, Alex Steffen, and some two dozen other experts around the world.