If you want to get people off drugs, improve reality.
If something's going wrong with this planet we'd better fix it here and not look for some sort of escape.
The wild places are where we began. When they end, so do we.
For how many people do you think might yet stand on this planet before the sun grows cold? That's the responsibility we hold in our hands.
I believe in the rights of creatures other than man.
All I know about thermal pollution is that if we continue our present rate of growth in electrical energy consumption it will simply take, by the year 2000, all our freshwater streams to cool the generators and reactors.