We've made some heroic efforts, but the Earth as a whole is in worse shape today than 30 years ago, ... There's been 30 more years of greenhouses gases, species extinctions and population growth.

There really wasn't an environmental movement 30 years ago. The Sierra Club national office in 1969 consisted of one full-time volunteer.

It is already too late to avoid mass starvation.

We shouldn't fuel the future with the polluting methods of the past, ... We have the technology to power our future in ways that don't threaten our health or poison our planet. Let's choose to use it.

Under communism, prices were not allowed to reflect economic reality. Under capitalism, prices don't reflect ecological reality. In the long run, the capitalist flaw -- if uncorrected -- may prove to be the more catastrophic.

Make Earth Day Every Day.” While we might not always live up to this ideal, I try to keep this quote from Denis Hayes, founder of the Earth Day Network and president of Seattle’s Bullitt Foundation, in mind when I need a little extra motivation to be a better environmentalist: “Listen up, you couch potatoes: each recycled beer can saves enough electricity to run a television for three hours.

We've made some heroic efforts, but the Earth as a whole is in worse shape today than 30 years ago, ... There's been 30 more years of greenhouses gases, species extinctions and population growth.