Ecologists, conservationists and physicosts are all alarmed by the effects of pollution on the earth and its people.Increasingly powerful machines have stepped up the impact of human activity on the environment.The impact of machines on the environment and, ultmately, on the environment. The impact of machines on the environment and, ultimately, on the sustainability of the planet, raise many fundamental question. How far can we go in the name of progress? Do we live for today's needs alone or plan for a habitable future? An attitude of extreme materialism blinds many nations to the answers.