Part of growing up is realizing the frustrating, heartbreaking truth that intense and sustained long-term effort is needed to effect change.

Obama set a record number of deportations of illegal immigrants in 2011, but that fact alone is misleading. Obama has spoken in favor of and has urged Congress to pass the DREAM Act, a bill that would allow young undocumented immigrants to stay in America, their home, and achieve citizenship by going to college or serving in the military.

The Profile in Courage Award recognizes elected officials who choose to do what is right, not what is easy, so that we might learn from their example. Each time we give the award, we bear witness to the past for the sake of the future.

Voting is great, but it's not an accomplishment. It's a responsibility.

It should simply be an empirical matter whether the climate is changing or not and whether we're responsible. But the various sides of the debate have now become so tribal that it's no longer a matter of changing our views as more information comes in.

A lot of my nonfiction is very strong environmental stories - I was the first guy to write about the dolphin killings in Japan.

We need senators who have studied physics and representatives who understand ecology.

Putting aside for the moment the question of whether human industrial CO2 emissions are having an effect on climate, it is quite clear that they are raising atmospheric CO2 levels. As a result, they are having a strong and markedly positive effect on plant growth worldwide. There is no doubt about this.