One of the early advocates promoting local-based economies to help stave off climate warming will speak Wednesday in Charleston in a return engagement.

Bill McKibben is a leading environmentalist author who wrote the eco-classic “The End of Nature” in 1989; it is considered the first general audience book about climate change. He is also a co-founder of 350.org, a climate-crisis website.

His presentation is titled “The Climate Heats Up.”

The Vermont resident talked last year about the paradox of “spending three-fourths of my life jetting around the globe stealing carbon. But my hope is the movement we’re building will be worth all the carbon.”

It staggers him a little that some people still don’t believe that human activity makes any difference in climate change.

“It’s clearly too late to stop global warming. We’ve already warmed a degree, and probably have bought another degree with the carbon we’ve already emitted,” he said. But, “it’s not a waterfall problem. It’s a rapid that’s getting nastier as we go down. There’s no point coming soon when you would throw up your hands and say we can do nothing.”

The lecture is at 6 p.m. in Physicians Auditorium at the College of Charleston, 66 George St. Seating is first-come, first-served. Doors open at 5 p.m.

His appearance is hosted by the Coastal Conservation League.

NOTE: A previously published version of this story gave the wrong date for his appearance.