This generation has altered the composition of the atmosphere on a global scale through radioactive materials and a steady increase in carbon dioxide from the burning of fossil fuels. Entire regional airsheds, crop plant environments, and river basins are heavy with noxious materials. Motor vehicles and home heating plants, municipal dumps and factories continually hurl pollutants into the air we breathe. Each day almost 50,000 tons of unpleasant, and sometimes poisonous, sulfur dioxide are added to the atmosphere, and our automobiles produce almost 300,000 tons of other pollutants.

'If you let a bully come in and chase you out of your front yard, he'll be on your porch and the next day he'll rape your wife in your own bed.

The moon and other celestial bodies should be free for exploration and use by all countries. No country should be permitted to advance a claim of sovereignty.

Yesterday is not ours to recover, but tomorrow is ours to win or lose.

I'm the only president you've got.

If you're not listening, you're not learning.

There is no Constitutional issue here. The command of the Constitution is plain. There is no moral issue. It is wrong - deadly wrong - to deny any of your fellow Americans the right to vote in this country. There is no issue of States' rights or National rights. There is only the struggle for human rights.