"Americans spend more on potato chips than we spend on clean-energy research and development."

"The best way to predict the future is to invent it."

"Social entrepreneurs who marry capitalism and philanthropy are using the power of the free market to drive social and economic progress."

"While national governments continue their excruciatingly frustrating dialog on climate change, we in the cities are acting. It’s sheer common sense. Becoming more efficient with your city’s energy needs means you’re also more economically secure."

"The increase in demand as the global economy recovers will undoubtedly lead to higher prices of certain commodity materials. What we, as a company, need to do as innovators is innovate our way out of that. We've got to find substitutes for those materials, and we're working on that now."

"Dwindling resources aren't just bad for the planet, they're bad for business," recalls William B. Kilbride, chief sustainability office at Mohawk, which has reduced its water use by 50% since 2005. "We knew that sustainability had to be a key driver of global business strategy."

"We are at the proverbial fork in the road. To continue as we are leads towards what the scientists have been warning us is a catastrophe."

"We need to be a department where more people can read both Foreign Affairs and a Bloomberg Terminal."