“That's right-the striking thing about greenhouse gases is the diversity of sources that emit them. A herd of cattle belching can be worse than highway full of hummers.”

“Pessimists are usually right and optimists are usually wrong but all the great changes have been accomplished by optimists.”

“Every morning in Africa, a gazelle wakes up. It knows it must run faster than the fastest lion, or it will be killed. Every morning a lion wakes up. It knows it must outrun the slowest gazelle, or it will starve to death. It doesn't matter whether you are a lion or a gazelle. When the sun comes up, you better start running.”

“The saying in China is "If you're one in a million, there's still 1,300 people just like you.”

“Everything I’ve ever gotten in life is largely due to the fact that I was born in this country, America, at this time with these opportunities for its citizens. It is the primary obligation of our generation to turn over a similar America to our kids.”

“No two countries that both had McDonald's had fought a war against each other since each got its McDonald's”

“Big breakthroughs happen when what is suddenly possible meets what is desperately needed”