We still think of air as free. But clean air is not free, and neither is clean water. The price tag on pollution control is high. Through our years of past carelessness we incurred a debt to nature, and now that debt is being called.
Richard M. NixonThe only time in the history of the world that we have had any extended periods of peace is when there has been a balance of power. It is when one nation becomes infinitely more powerful in relation to its potential competitors that the danger of war arises.
Richard M. Nixon