This video explains the concept of global warming, which is generally thought to be caused by human driven emissions of greenhouse
gasses, such as carbon dioxide.
Tags:what is global warming,carbon dioxide,global warming,greenhouse effect,greenhouse gasses
Grab video code:
Scientist agreed that the world is heating up. Global warming describes the green house effect. Searching gases allows short wave radiation from the sun to pass through them unabsorbed. Well, also absorbing some long wave radiation that gets reflected back in to space.
Green house gases trap heat the way glass walls of a green house do. They include methane and nitrous oxide, but the paramount culprit is carbon dioxide. It is significantly enhances the absorption and conversion of sunlight energy in to heat.
For thousands of years, emissions of green house gases to the atmosphere have been well balanced by the amount of green house gases that get naturally absorbed. These conditions have allowed human civilization to develop with an inconsistent climate.
Photosynthesis enriches the planet with oxygen as plants and algae and other organisms suck up CO2 from the air. Special claim minerals have also absorb oxygen consuming compounds on to the sea floor. Volcanic eruptions emit particles that cool the earth’s surface, but only briefly, that is temporarily masking the full effect of CO2.
Evidence show that human activity contributes to global warming by adding 2 and changing the levels of the gasses responsible for the green house effect.
Changes that have historically taken thousands of years are now happening over the cores of decades. Fine permafrost and the rapid retreat of glaziers in Greenland Alaska, The Himalayas, The Antarctic Peninsula and on high tropical mountains show that global snow cover is melting, and that massive glaziers worldwide are disappearing fast
Water flows to the seas from glaziers and icecaps as ocean water warms and expands, then sleet populated cities like Tokyo, Shanghai, Bangkok, and New York are all at risk. Scientist predicts that floods and drought are likely to increase in number in severity, and climate related diseases like malaria can serge.
Other sciences of climate change are seen in drying forests and dying wildlife. Reducing the threat of global climate change starts with sharing technologies and resources to lower green house gas emissions and using clean energy options were available such as wind, solar, and wave power.