Air Pollution Facts, Air Pollution Effects, Air Pollution Solutions, Air Pollution Causes

Smog hanging over cities is the most familiar and obvious form of air pollution. But there are different kinds of pollution—some visible, some invisible—that contribute to global warming. Generally any substance that people introduce into the atmosphere that has damaging effects on living things and the environment is considered air pollution. Carbon dioxide, a greenhouse gas, is the main pollutant that is warming Earth. Though living things emit carbon dioxide when they breathe, carbon dioxide is widely considered to be a pollutant when associated with cars, planes, power plants, and other human activities that involve the burning of fossil fuels such as gasoline and natural gas. Other greenhouse gases include methane—which comes from such sources as swamps and gas emitted by livestock—and chlorofluorocarbons (CFCs), which were used in refrigerants and aerosol propellants until they were banned because of their deteriorating effect on Earth's ozone layer.

Sustainability | Air Pollution | Air Quality | Acid Rain Environment > Air Pollution One of Earth's most important natural resources is its atmosphere. The atmosphere contains air without which plants and animals could not survive. It contains greenhouse gases which keep the planet naturally warmer than it would be otherwise, maintaining an average global temperature above freezing that allows water to exist in its liquid state, a necessary condition for most life. If mankind is to protect and preserve this unique natural resource for future generations as well as other ecosystems, it must continue to address the problem of air pollution which affects the atmosphere from the local to the global scale. Air Pollution and concern about air quality are not new. In the 1970s the transboundary effects of industrial air pollution become known as acid rain. Acid rain is particularly harmful to vegetation as the acid in the rain changes the pH of the soil and leeches away important minerals.

Qu'est-ce que le phytoplancton? - Phenomer Le phytoplancton, poumon de la planète Contrairement aux idées reçues, ce ne sont pas uniquement les forêts qui constituent le poumon de notre planète. A l’instar des plantes terrestres, le phytoplancton est constitué d'organismes photosynthétiques pourvus de chlorophylle grâce à laquelle il peut capter l’énergie solaire. La lumière du Soleil, le dioxyde de carbone et les sels minéraux dissous dans l’eau (principalement l’azote et le phosphate) suffisent au phytoplancton pour se développer et produire de l’oxygène, qui va diffuser à la surface des océans dans l’atmosphère. Le phytoplancton produit ainsi plus de la moitié de l’oxygène sur Terre, alors qu’il ne représente que 1% de la biomasse d’organismes photosynthétiques. Le premier maillon de la chaîne alimentaire marine Grâce à la photosynthèse, le phytoplancton est capable de synthétiser de la matière organique (sucres) réutilisable par d’autres organismes comme le zooplancton. Une grande diversité de formes et de couleurs