I believe we have a responsibility not only to our contemporaries but also to future generations — a responsibility to preserve resources that belong to them as well as to us, and without which none of us can survive. That means we must do much more, and urgently, to prevent or slow down climate change. Everyday that we do nothing, or too little, imposes higher costs on our children and our children's children. Of course, it reminds me of an African proverb — the earth is not ours but something we hold in trust for future generations. I hope my generation will be worthy of that trust.

Truman Library address (2006)