The source document for this Digest states: Invasion resistance The preservation of the number, types, and relative abundance of resident species can enhance invasion resistance in a wide range of natural and semi-natural ecosystems medium certainty. Although areas of high species richness such as biodiversity hot spots are more susceptible to invasion than species- poor areas, within a given habitat the preservation of its natural species pool appears to increase its resistance to invasions by non-native species. This is also supported by evidence from several marine ecosystems, where decreases in the richness of native taxa were correlated with increased survival and percent cover of invading species C
The atmosphere is a complex dynamic natural gaseous system that is essential to support life on planet Earth. Some of these pollutants can be created by indoor activities such as smoking and cooking.
It is therefore important to consider both indoor and outdoor air pollution. Outdoor Air Pollution Smog is a type of large-scale outdoor pollution.
It is caused by chemical reactions between pollutants derived from different sources, primarily automobile exhaust and industrial emissions. Cities are often centers of these types of activities, and many suffer from the effects of smog, especially during the warm months of the year.
Another consequence of outdoor air pollution is acid rain. When a pollutant, such as sulfuric acid combines with droplets of water in the air, the water or snow can become acidified. The effects of acid rain on the environment can be very serious.
It damages plants by destroying their leaves, it poisons the soil, and it changes the chemistry of lakes and streams. Damage due to acid rain kills trees and harms animals, fish, and other wildlife. The Greenhouse Effect, also referred to as global warming, is generally believed to come from the build up of carbon dioxide gas in the atmosphere.
Carbon dioxide is produced when fuels are burned. Thus, the amount of carbon dioxide in the air is continuing to increase. This buildup acts like a blanket and traps heat close to the surface of our earth. Changes of even a few degrees will affect us all through changes in the climate and even the possibility that the polar ice caps may melt.
Ozone depletion is another result of pollution. Chemicals released by our activities affect the stratosphereone of the atmospheric layers surrounding earth.
The ozone layer in the stratosphere protects the earth from harmful ultraviolet radiation from the sun. Ultraviolet radiation is known to cause skin cancer and has damaging effects on plants and wildlife. We work, study, eat, drink and sleep in enclosed environments where air circulation may be restricted.
For these reasons, some experts feel that more people suffer from the effects of indoor air pollution than outdoor pollution. There are many sources of indoor air pollution. Tobacco smoke, cooking and heating appliances, and vapors from building materials, paints, furniture, etc.
Radon is a natural radioactive gas released from the earth, and it can be found concentrated in basements in some parts of the United States. Pollution exposure at home and work is often greater than outdoors. Pollutants Pollutants can be classified as primary or secondary.
Zimbabwe is a landlocked country in southern Africa lying wholly within the tropics. It straddles an extensive high inland plateau that drops northwards to the Zambezi valley where the border with Zambia is and similarly drops southwards to the Limpopo valley and the border with South regardbouddhiste.com country has borders with Botswana km, . A natural disaster is a natural phenomenon or phenomena occurred covering relatively large territories and leading to human casualties or substantial damages to property and causing thereby serious obstacles to smooth operation of the society. Air Pollution, Floods & Droughts, Afforestation & Deforestation, Biodiversity Essay as massive attempts at irrigation in drought-prone areas. Afforestation Afforestation is the establishment of a forest or stand of trees in an area where there was no forest..
Usually, primary pollutants are directly emitted from a process, such as ash from a volcanic eruption, the carbon monoxide gas from a motor vehicle exhaust or sulfur dioxide released from factories. Secondary pollutants are not emitted directly.
Rather, they form in the air when primary pollutants react or interact. Some pollutants may be both primary and secondary: Major primary pollutants produced by human activity include: Sulfur oxides SOx — especially sulphur dioxide, a chemical compound with the formula SO2.
SO2 is produced by volcanoes and in various industrial processes.
Since coal and petroleum often contain sulphur compounds, their combustion generates sulfur dioxide. Nitrogen oxides NOx — especially nitrogen dioxide are emitted from high temperature combustion.
Can be seen as the brown haze dome above or plume downwind of cities. Nitrogen dioxide is the chemical compound with the formula NO2.
Carbon monoxide — is a colourless, odorless, non-irritating but very poisonous gas. It is a product by incomplete combustion of fuel such as natural gas, coal or wood. Vehicular exhaust is a major source of carbon monoxide. Carbon dioxide CO2 — a colourless, odorless, non-toxic greenhouse gas associated with ocean acidification, emitted from sources such as combustion, cement production, and respiration Volatile organic compounds — VOCs are an important outdoor air pollutant.
Methane is an extremely efficient greenhouse gas which contributes to enhanced global warming. Particulate matter — Particulates, alternatively referred to as particulate matter PM or fine particles, are tiny particles of solid or liquid suspended in a gas.The best way to reduce global warming is, without any doubt, cutting down our anthropogenic emissions of greenhouse gases.
But the world economy is addict to energy, which is mainly produced by fossil carbon fuels. Air Pollution, Floods & Droughts, Afforestation & Deforestation, Biodiversity 01 Dec, Free Essays 0 Air pollution Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or cause damage to the natural environment or built environment.
The overall approach to disaster management in Mozambique has recently been reviewed (although the demands of responding to the devastating floods of and distracted from major institutional changes). A wildfire or wildland fire is a fire in an area of combustible vegetation that occurs in the countryside or rural area.
Depending on the type of vegetation where it occurs, a wildfire can also be classified more specifically as a brush fire, bush fire, desert fire, forest fire, grass fire, hill fire, peat fire, vegetation fire, and veld fire..
Fossil charcoal indicates that .
Stage-wise Syllabus for Environmental Education. Mission Statement. Creating a society of motivated citizens committed to conservation, preservation and protection of the environment and striving towards a life in perfect harmony with nature.
The one process ongoing that will take millions of years to correct is the loss of genetic and species diversity by the destruction of natural habitats.