Question

Wrire a short paragraph of your own imagination on 'Pollution a threat to Earth'

Answer 1

Ecology means the study of the relationship of plants and animals, or people and institutions, in their natural surroundings. But for all practical purposes it means you in your environment — and what you think of the world you live in.

Environment includes everything that affects the quality of your life: the air you breathe, the water you drink or swim in, your apartment or house, the numbers of people, the traffic, the noise, the streets, shops, parks, countryside, seashore, wildlife, factories, farming, mining. All these are in some way designed, controlled or ignored by the people in charge.

The different kinds of pollution are all connected. What happens to the air affects the land. What happens to the land affects the water around us. And what happens to the water affects the air.

Man has been polluting the Earth from the time he first lit his first fire, washed his clothes in the river and threw his trash on the ground. When land was used up or the river dirty, man moved on to another place. At first, the Earth could handle this problem because there was plenty of fresh air, land and water. This is no longer true. The rise in population and the spread of industry have changed that. New kinds of waste, such as plastics, will not rot into the soil. New chemicals will not dissolve in water. Our environment is becoming overloaded with waste. Every year about 150,000,000 tons of dirt, sprays and gases are released into the air over the USA. Polluted air damages paint and metal, makes your clothes dirty, keeps plants from growing and can also cause lung diseases — and death. There are two main causes of air pollution: fumes from cars, trucks and buses; fumes from industrial plants.

Motor vehicles cause most of our air pollution. They release more than 60 per cent of the dangerous gases into the air. In large cities cars are responsible for about 80 per cent of the air pollution. Gasoline engines give off a colorless, odorless gas called carbon monoxide (formula CO) that will make you sleepy, give you a headache and finally kill you. Scientists say that breathing the air of New York is like smoking forty cigarettes a day.

Answer 2

Environmental pollution is one of the most serious problems facing humanity and other life forms on our planet today. Badly polluted air can harm crops and cause life-threatening illnesses. Some air pollutants have reduced the capacity of the atmosphere to filter out the sun's harmful ultraviolet radiation. Many scientists believe that these and other air pollutants have begun to change climates around the world. Water and soil pollution threaten the ability of farmers to grow enough food to feed the world's population. Ocean pollution endangers many marine beings.

Many people think of air, water, and soil pollution as distinct forms of pollution. However, each of the parts of an environment - air, water, and soil--depends upon the others and upon the plants and animals living within the environment. The relationships among all the living and nonliving things in an environment make up an ecological system, called an ecosystem. All the ecosystems of the earth are connected. Thus, pollution that seems to affect only one part of the environment may also affect other parts. For example, dirty  smoke from a power plant might appear to harm only the atmosphere. But rain can wash some harmful chemicals in the smoke out of the sky and onto land or into waterways. 

Some pollution comes from one specific point or location, such as a sewage pipe spilling dirty water into a river. Such pollution is called point source pollution. Other pollution comes from large areas. Water can run off farmland and carry pesticides and fertilizers into rivers. Rain water can wash petrol, oil, and salt from roads and car parks into the wells that supply drinking water. Pollution that comes from such large areas is called non-point source pollution.
 
Nearly everyone would like to have pollution reduced enviroment. Unfortunately, most of the pollution that now threatens the health of our planet comes from products that many people want and need. For example, scooters provide the convenience of personal transportation, but they create a large percentage of the world's air pollution. Factories make products that people use and enjoy, but industrial processes can also pollute. Pesticides and fertilizers aid in growing large quantities of food, but they also poison the soil and waterways.
 
To end or greatly decrease pollution, people would have to reduce the use of scooters /cars  and other modern conveniences, and some factories would have to close or change production methods. Because most people's jobs are dependent on industries that contribute to environmental pollution, shutting down these industries would increase unemployment. In addition, if farmers suddenly stopped using chemical fertilizers and pesticides, there would be less food to feed the people of the world.
 
Over time, however, pollution can be reduced in many ways without seriously disrupting people's lives. For example, governments can pass laws that encourage businesses to adopt less polluting methods of operation. Scientists and engineers can develop products and processes that are cleaner and safer for the environment. And individuals and groups of people around the world can themselves find ways to reduce environmental pollution.