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The Greenhouse Effect
Transcript of The Greenhouse Effect
Key Greenhouse Gases
1. Carbon dioxide
Main Natural Sources
What is it?
You can think of greenhouse gases as sort of a blanket for infrared radiation. They keep the Earth's surface and lower layers of atmosphere warm.
How does it work?
When the sun's rays hit the Earth's atmosphere and the surface of the Earth, approximately 70 percent of the energy stays on the planet. The other 30 percent is reflected into space.
But even the 70 percent that gets through doesn't stay on earth forever. The Earth's oceans and land masses eventually radiate heat back out. Some of this heat makes it into space. The rest of it ends up getting absorbed when it hits certain things in the atmosphere, such as carbon dioxide, methane gas and water vapor.
After these components in our atmosphere absorb all this heat, they emit energy (also in the form of heat). The heat that doesn't make it out through Earth's atmosphere keeps the planet warm.
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Carbon dioxide => Emitted primarily through the burning of fossil fuels (oil, natural gas, and coal), solid waste, and trees and wood products. Changes in land use also play a role. Deforestation and soil degradation add carbon dioxide to the atmosphere, while forest regrowth takes it out of the atmosphere.
Methane=> Can be found in geysers. Emitted during the production and transport of coal, natural gas, and oil. Methane emissions also result from livestock and agricultural practices and from the anaerobic decay of organic waste in municipal solid waste landfills.
Nitrous oxide= => Emitted during agricultural and industrial activities, as well as during combustion of fossil fuels and solid waste.
Fluorinated gases => A group of gases that includes hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride, among other chemicals. These gases are emitted from a variety of industrial processes and commercial and household uses, and do not occur naturally. Sometimes used as substitutes for ozone-depleting substances such as chlorofluorocarbons (CFCs).
The Greenhouse Effect is when
there are various gases in the atmosphere that traps the sun's energy. When unable to escape the atmosphere the added solar energy results in warmer air temperature.
What are the main sources due to human activity?
Carbon dioxide Released By Human Activity
Consuming electricity: Burning fossil fuels emits CO2
Building: Industrial manufacturing emits lots of CO2
Deforestation: Trees are potent organisms for absorbing and removing CO2 emissions from the air.
Among others, the primary problem is that we burn fossil fuels. The largest contributions to this include transportation: cars or planes burn gas; electricity: much of our power in Vancouver is hydro-power, but in many places coal-burning plants are still used. Other causes include the food industry; and decay of garbage in massive land fills.
Thank You for Watching!
The Greenhouse effect is the cause for the phenomenon known as "Global Warming" and is a thickening of the atmosphere caused by certain gases, causing a retention of energy; much like how a greenhouse retains heat for its plants. Naturally, not enough greenhouse gases enter the atmosphere to produce the effect. It is human action that causes the effect, especially when it comes to CO2.
The problem is not just with the burning of the gas, but with the loss of the factors that would naturally take care of them. Getting rid of the trees, that convert CO2 into oxygen, is getting rid of countermeasures against CO2, the most prominent greenhouse gas. The pollution of the ocean is killing algae, who convert much of the CO2 as well.
cutting down defense....
The term “carbon footprint” refers to the amount of carbon (C02) we emit individually in any one-year period. C02 is produced from many sources and is the primary gas responsible for Global warming and the resulting alarming changes in our climate.