My life's work has been accomplished. I did all that I could.

We must treat water as if it were the most precious thing in the world, the most valuable natural resource. Be economical with water! Don't waste it! We still have time to do something about this problem before it is too late.

The human race has entered a stage where we are all dependent on each other. No other country or nation should be regarded in total separation from another, let alone pitted against another.

The opponents of perestroika had suffered a defeat, and then they organized the coup.

Nature is reminding us that it used to exist without human beings.

Man is beginning to explore the galaxy. But how much remains undone on earth?

The model of the consumer society is something that will one day end. My personal view is that too much consumption is wrong.