Those interested in sustainability have the opportunity to learn from one of the earliest leaders in the sustainability movement, for free.

David Gottfried, author of the new book Explosion Green, along with Stephen Ashkin, president of The Ashkin Group, and Healthy Schools Campaign's Mark Bishop, will be conducting a 60-minute webinar discussing the history and evolution of the worldwide green building movement.

According to Ashkin, Gottfried has more than 20 years of firsthand experience in the green building movement.

"He was there making things happen long before most of us ever heard of or were that concerned with green and sustainable issues,” says Ashkin.

He adds that Gottfried has a "unique perspective" and some "very candid views" about the green evolution of the past two decades.

"This webinar will not only be interesting, it should be inspiring," concludes Ashkin. "We will hear how one person, in this case David Gottfried, really started a global movement."

This free webinar takes place today, Sept. 3, from 2:00 p.m. to 3:00 p.m. EST. Click here to join.