If our nation wants to reduce global warming, air pollution and energy instability, we should invest only in the best energy options. Nuclear energy isn't one of them.

I would like nuclear fusion to become a practical power source. It would provide an inexhaustible supply of energy, without pollution or global warming.

Global warming, global poverty, pollution, and terrorism constitute some of our biggest challenges in this century. No wonder these global issues are changing our world views from nation-centric to world-centric.

Putting a tax on carbon could be an effective approach for curbing global warming pollution.

President Bush's energy program won't help lower gas prices or slow global warming.

The challenge of global warming should stimulate a whole raft of manifestly benign innovations - for conserving energy and generating it by 'clean' means (biofuels, innovative renewables, carbon sequestration, and nuclear fusion).