Описание презентации по отдельным слайдам:
Ecological problems and pollution
Main problems: - Deforestation - Forest fires - Global warming -Air and water pollution -Flood -Earthquake
Deforestation actual problem. Deforestation leads to a reduction of timber resources, including for industrial use, as well as the greenhouse effect due to the decline in photosynthesis.
Forest is our air
Deforestation occurs for many reasons: trees or derived charcoal are used as, or sold, for fuel or as timber, while cleared land is used as pasture for livestock, plantations of commodities, and settlements. Deforested regions typically incur significant adverse soil erosion and frequently degrade into wasteland.
Forest fires In recent years, the number of intentionally started forest fires has increased alarmingly. Some examples are the fires started by lit cigarette butts or uncontrolled bonfires in unsuitable places.
This is a problem that concerns us all, and we all need to fix it.
Global warming is the rise in temperature in the air
-Air and water pollution Some of the main contributors to water pollution are: Factories Refineries Waste treatment facilities Mining Pesticides, herbicides and fertilizers Human sewage Oil spills Failing septic systems Soap from washing your car Oil and antifreeze leaking from cars Household chemicals Animal waste
Often used as a synonym for global warming use the phrase "greenhouse effect"
Some of the main contributors to air pollution are: Automobile emissions Tobacco smoke Combustion of coal Acid rain Noise pollution from cars and construction Power plants Manufacturing buildings Large ships Paint fumes Aerosol sprays Wildfires Nuclear weapons
A flood is an overflow of water that submerges land which is usually dry. Flooding may occur as an overflow of water from water bodies, such as a river or lake, in which the water overtops or breaks levees, resulting in some of that water escaping its usual boundaries,or it may occur due to an accumulation of rainwater on saturated ground in an areal flood.
Is the result of a sudden release of energy in the Earth's crust that creates seismic waves.
Презентация о проблемах окружающей среды, видах загрязнений. Способы предотвращения экологических катастроф. Пояснения, что может сделать простой ученик, чтобы помочь нашей планете.
В презентации представлены проблемы: глобальное потепление, вырубка лесов, природные пожары лесов и степей, загрязнение воды и воздуха.
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