Pollution
Published on Dec 20, 2015
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PRESENTATION OUTLINE
Oceans have important functions. There currents help regulate and moderate earth climate. They are also a vital part of the water cycle, and a habitat for marine organisms. Freshwater, however, is what people need in order to leave. While freshwater is important, earth reserves are small. Less than 1% is usable freshwater.
Photo by Fr Antunes
Introduction
Water, air, and land resources are essential for life. Clean water and clean air are needed every day to provide nutrients that allow plants (the basis of our own food supply) to grow. How do people use (and sometimes Misuse) these vital resources.
Photo by Яick Harris
FRESHWATER POLLUTION
Photo by Mollivan Jon
1. Point source pollution is pollution that comes from a non-and specific location such as the factory pipes.
2. Non-point source pollution is pollution that does not have a specific point of origin.
3. Runoff
(water flowing over land rather than seeping into the ground), often carries non-point source pollution.
Photo by mpeacey
Water filtering through piles of waste rock from coal mines can carry sulfuric acid into rivers or lakes killing aquatic life
Earth’s atmosphere is a blanket of nitrogen, oxygen, water vapor and other gases.
Photo by scalespeeder
Certain greenhouse gases in the atmosphere (carbon dioxide, methane, and water vapor) help maintain a warm temperature near earth surface. When solar energy heats the earth, the earth gives off some of this energy as heat. The gases of solar heat earth gametes keep in the atmosphere warm enough for life as we know it.
Photo by net_efekt
Pollution in the air
Pollution can change the chemical composition of the atmosphere and disrupt is natural cycles and functions.
4. Fossil – fuel combustion is the major source of air pollution. Most of this pollution come from motor vehicle and coal or oil burning power plants. Motor vehicles release carbon monoxide and nitrogen oxide and other pollutants forming smog.
Photo by joiseyshowaa
5. Power plants release sulfur dioxide and nitrogen oxides. These pollutants combined with water vapor in the air to create acid rain.
Photo by Ben Reierson
Mines are essential because they produce many of the mineral resources we need.
Mining tears up the surface and destroys vegetation.
Photo by boeke
6. Mining can cause a soil erosion and create pollution that contaminates surrounding soil and water destroying ecosystems.
Photo by voyageAnatolia.blogspot.com
7. Agriculture impacts the land as well. Extensive irrigation can cause salinization (the buildup of salt in the soil) as the water evaporates rendering the land useless.
Photo by keeva999
8. Deforestation also damages land. Clear areas are susceptible soil erosion destroying ecosystems and wildlife habitat.
Photo by Ikhlasul Amal
9. The land also serves as a disposal site. When done correctly, there’s minimal impact. But old landfills can leak harmful waste damaging soil and underground water.
Photo by bsabarnowl
