Alden Meyer, Director of Strategy and Policy, Union of Concerned Scientists:
"Vice President Gore has laid down a bold challenge to America, and we applaud his leadership. The science is clear and compelling -- we face truly serious consequences from human-induced climate change that require an urgent response. We must transform our economy by using energy much more efficiently, and by tapping our huge domestic reservoir of clean, renewable resources.

Once again, Al Gore has underscored that incremental solutions are not sufficient, and that we must mobilize for the rapid transformation of our energy economy. We have the technologies needed to slash our emissions of heat-trapping gases in every sector of the economy; what's needed is the political will to move them into the marketplace much more quickly."

"We must all take Al Gore's call for action seriously. Responding to climate change requires the full engagement of national, state and local public officials, business executives, religious and community leaders, and every citizen. By uniting in this common purpose and mobilizing America's ingenuity and can-do spirit, we can rise to this challenge. We can revitalize our economy, increase our energy security, and do our part to cut global warming pollution, all at the same time."

"Vice President Gore deserves our deep thanks for highlighting the need for action in such a clear and compelling way. Now it's up to all of us to respond with the same level of courage and conviction he has shown in working together to get the job done."