Pollution means any contamination of air, soil, water and environment. Even loud noise and sound are part of pollution. Pollution can be categorized into land, water and air pollution. Harmful gases and tiny particles (like carbon dioxide, nitrogen dioxide and sulphur dioxide) are polluting the air. The smoke released from burning fuel from factories and cars, are the major sources of air pollution. Air pollution is one of the major causes of that funny cough, asthma and burning eyes that you develop.
In addition to this, our water gets polluted because of the dirty water from our house, that drains through the pipes into the rivers and oceans dirtying the water. At last, plastic and dirt causes land pollution. We need to prevent all kinds of pollution to protect the environment. Besides ourselves, many animal species are the victims of pollutions.

Great Lakes monitoring groups announce rules to stop invasive species. - Canadian and US corporations overseeing the St. Lawrence Seaway announced new regulations, demanded by environmental groups for decades, that enforce flushing all ballast tanks with salt water.

Firms seek patents on 'climate ready' altered crops. - Agricultural biotechnology companies are seeking hundreds of patents on gene-altered crops as part of a race for dominance in the potentially lucrative market for crops that can handle global warming.