Factories, vehicles and homes burn fuels that release gases into the air. The so called green house gases trap heat. They cause global warming and change world climates. Other kinds of pollution include the poisoning of rivers and seas by factory and household wastes.
Air pollution occurs when gases such as carbon dioxide are emitted into the air by factories, homes and offices. Vehicles also cause air pollution, which produces city smogs, acid rain, and global warming.
Pollution of river also affects people and environment. When factories pump poisonous wastes into river, creatures living neat the rivers mouths, such as shellfish, absorb poison into their bodies. When people eat such creatures, they, too, are poisoned. Coral reefs and mangrove swamps are also breeding places for many fishes. The destruction and pollution of these areas is threatening fishes in the oceans.
Global warming has its worst effect on island nations. The Netherlands is a flat country and about two fifths of it is below sea level at high tide. It could affect the Netherlands. Increasingly stormy weather and rises in the sea level could cause massive flooding. Even coral islands are low-lying. If global warming melts the world's ice, then sea levels will rise. Countries such as the Maldives, and kirihati could vanish under the waves.
There is yet another threat in deforestation. When at one end of the world, countries like Israel are turning barren deserts into cultivable farmland by irrigation, the rainforests in the tropics are being destroyed. These forests contain more than half of the worlds living species. Many of them are threatened with extinction. Besides forest fires that destroy large areas of rainforest, over exploitation of them also had become a matter of worry.
Rainforests are cut down by loggers who want to sell valuable hardwoods. Land stripped bare of trees is exposed to the wind and rain, which cause serious soil erosion.
Unless we take serious and sincere steps to curb environmental pollution, chances of survivals are very less to mankind.
