Our beautiful environment is rapidly degrading in the scenery, variety and peacefulness. This is due to human interference in the natural world.
air pollution is caused by harmful gases such as carbon dioxide, sulphur dioxide and nitrogen dioxide and very small particles of carbon. Most of the pollution is caused by factories, vehicles and livestock. Today air pollution has become a great threat to human life. People face breathing problems like asthma due to pollution
Water pollution is the presence of harmful materials in water, such as sewage, dissolved metals, waste from farms and factories and crude oil spilled from shipwrecked tankers. The three main substances that pollute water are nitrates from fertilizers, sewage and detergents. Pollution causes harm to organisms living in water and can also harm people’s health, and can cause problems such as cancer.
There are thought to be 29 000 rhinos left in the world- of which 20 000 live in South Africa. 455 rhinos have been poached in South Africa since 2012. A kilogram of rhino horn is about R650 000. China has only 3 000 rhinos left. South African wildlife authorities have made 200 arrests in relation to rhino poaching in 2012.
The production of nuclear weapons has polluted vast amounts of soil and water at hundreds of nuclear weapons facilities all over the world. Many of the substances released, including plutonium, uranium, strontium, caesium, benzene, polychlorinated biphenyls (PCBs), mercury and cyanide, are carcinogenic and/or mutagenic and remain hazardous for thousands, some for hundreds of thousands, of years. Contaminants from nuclear weapons production and testing have often travelled far down wind and downstream. Production facilities for nuclear weapons are heavily polluted, for example in the United States there are over 4500 contaminated Department of Energy sites.
The Term Paper on Heavy Metals Pollution in Water
HEAVY METALS POLLUTION IN WATER Generally the water pollution is described as the presence in water of enough harmful or objectionable material to damage the water's quality. Water pollution has many sources and characteristics. Humans and other organisms produce bodily wastes which enter rivers, lakes, oceans and other surface waters; Industry is creating new chemicals each year, all of which ...
Sound becomes unwanted when it either interferes with normal activities such as sleeping, conversation, or disrupts or diminishes one’s quality of life. Not all noise can be called noise pollution. If it does not happen regularly, it may be termed as ‘Nuisance ‘Scientists also believe that it’s not only humans who are affected. For example, water animals are subjected to noise by submarines and big ships on the ocean, and chain-saw operations by timber companies also create extreme noise to animals in the forests. Generally, noise is produced by household gadgets, big trucks, vehicles and motorbikes on the road, jet planes and helicopters hovering over cities, loud speakers etc. Noise (or sound) is measured in the units of decibels and is denoted by the dB. Noise which is more than 115 dB is tolerant. The industrial limit of sound in the industries must be 75 dB according to the World Health Organization. Noise is considered as environmental pollution, even though it is thought to have less damage on humans than water, air or land pollution. But people who are affected by severe noise pollution know that it is a massive issue that needs attention.
