It is happily and kindly provided that in every life there are certain pauses, and interruptions, which force consideration upon the careless, and seriousness upon the light, points of time where one course of action ends and another begins.
Lyndon B. JohnsonThis 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.
Lyndon B. Johnson