Ecologists are faced With the problem of increasing proportions of carbon-dioxide, carbon mono oxide in the atmosphere, spillage of oil on the ocean`s surface, pollution of the atmosphere and water resources by nuclear power reactors through increase in the radioactive dust, twisted carcases of automobiles, aluminum cans, synthetic plastics, solid waste and industrial waste, . In order to minimize air pollution internal combustion engines should be replaced by steamengines in all automobiles. The use of electric cars and solar energy driven automobiles can overcome the problem. Emission of poisonous gases alongwith the dust pollute the atmosphere. Water pollution comes from soap factories, textile mills, paper mills and atomic reactors, which discharge hot water leading to thermal pollution. It destroys the fish, vegetation and makes the water unfit for bathing and drinking. Noise is another pollution hazard due to road traffic and aircraft; when a sudden noise strikes the ear, the heart beats rapidly, the blood vessels constrict. The pupils dilate and the stomach, oesophagus and intestines are seized by spams.