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Advantages of Greenhouse Effect





Before we delve into this topic let us understand the green house effect first.
The primary greenhouse gases in Earth’s atmosphere are water vapour, CO2 and Ozone along with other gases like methane, CFC’s or chlor-fluoro-carbon and nitrous oxide. 
These gases are rather inefficient absorbers of solar radiation and thus allow much of the incoming solar energy to pass through the atmosphere to heat the Earth’s surface.
They are good absorbers of the long wave IR radiation that is reflected from the surface. 
A proportion of outgoing energy absorbed by these gases is re-radiated back toward the planet producing an additional warming of the troposphere and Earth’s surface. This is better known as greenhouse effect.

The present day greenhouse warming is estimated to be 33oC. 
The greenhouse gases in the Earth’s atmosphere therefore raise the global mean temperature of the surface from freezing point of water to a comfortable level of around 15oC.
The presence of greenhouse gases in the Earth’s atmosphere has therefore been essential for habitability. 
The amount of CO2 and other greenhouse gases in the atmosphere have varied significantly over the years, but the mean global temperature has not varied greatly in last few billion years. 
The presence of equable temperatures has enabled life to evolve on Earth and has in a way contributed to maintain the overall global temperatures within limits.

Advantages of Greenhouse Effect:

(a)    Unlike other planets this planet is able to sustain life is because the greenhouse effect has maintained the temperatures within a manageable limit.
(b)    The greenhouse effect also helped maintain the water balance in all the spheres of this planet. 
(c)    The greenhouse effect has helped in restricting the polar caps in Polar Regions only.
(d)    Increase in greenhouse gas may also lead to melting of northern ice regions to thaw and thus make it habitable.
(e)    Due to the greenhouse effect and an increase in the moisture level in atmosphere, rainfall is possible in regions where it was un-imaginable before.
(f)    Agriculture is now possible in regions which are primarily arid or semi-arid zones and better agricultural practices where cropping is completely dependent upon rain water harvesting.
(g)    The overall greenhouse effect also in a way helps in extending the growing season of crops and so many crop products or vegetables are now available beyond season.
(h)    Both growing and flowering in plants are completely temperature dependent and thus with prevailing average temperature along with the presence of humidity in high percentile help plants to grow and yield better than before.

Let us not forget that the greenhouse bad effects are quite large compared to greenhouse effect benefits and thus it is always better to control the greenhouse gases within safe limits before it is too late for the mankind to survive in earth system.

 

Best Results From Wikipedia Yahoo Answers Encyclopedia Youtube


From Wikipedia

Greenhouse effect - Wikipedia, the free encyclopedia

Titan has an anti-greenhouse effect, in that its atmosphere absorbs solarradiation but is relatively transparent to infrared radiation. ...

Greenhouse gas

A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in the Earth's atmosphere are water vapor, carbon dioxide,


From Encyclopedia

Earth Sciences: The Greenhouse Effect

The first suggestion that burning fossil fuels could warm the Earth's atmosphere was in 1896 by Svante Arrhenius, the famous chemist. Few people believed him. The atmosphere was thought to be so big and so stable that it could not possibly be affected by small fires.


From Yahoo Answers

Question:

Answers:The "greenhouse effect" keeps Earth warm enough for us to live and grow food. But too much would be bad. Some gases ("greenhouse gases") let sunlight in, which warms the Earth, and then block that heat from leaving. That's the "greenhouse effect", and it's a natural thing, mostly caused by water vapor. Man is making excessive amounts of greenhouse gases, mostly by burning fossil fuels. That causes the delicate natural balance to go out of whack and the Earth warms. That's global warming. It won't be a Hollywood style disaster. Gradually coastal areas will flood and agriculture will be damaged. But it will be very bad. Rich countries will cope, but it will take huge amounts of money. In poor countries many people will die of starvation, but not all of them. Most scientists say, in 20-50 years. But we need to start right now to fix it, fixing it will take even longer than that. Really good website for more information here: http://profend.com/global-warming/ "If the Earth came with an operating manual, the chapter on climate might begin with a caveat that the system has been adjusted at the factory for optimum comfort, so don't touch the dials."

Question:i know that gases, whic cause the greenhouse effects include : carbon dioxide and methane.

Answers:The only advantage is that it doesn't need to be removed or broken down latter. It's much easier to not procuce a harmfull product that it is to remove it once it has been created. Anytime a carbon based fuel is oxidized it creates these products. (CO, CO2) Using a fuel not carbon based does not create Carbon by-products. ie, Hydrogen. combined with oxygen only creates H2O.

Question:what are some advantages of reducing greenhouse gas emissions even if we dont know their overall effects

Answers:The obvious answer is that it is hazardous to the environment and causes global warming. Others is that is reduces the amount of oxygen in the air

Question:Temperature vary from 4 degrees celsius to 39 degree celsius. Most of the days sunny.what crops can i grow? It only direct sunlight for maybe 3 hrs

Answers:What do you mean by an opaque greenhouse? You mean with shadings or whitened or painted with white sun block? Anyway, plants normally need > 5 celsius for the roots to grow. Your lower end is too low. And if it is completely opaque, nothing, except mushrooms will grow. They need light. The best thing to do is to experiment with as many different type of plants which you like to see how well they do. I suggest that it is probably worth starting (assuming you're in the UK) around late April if you don't get a lot of sun as the night temp will drop too low. Start your seeds in the house or a heated propagator and transfer to the greenhouse when the minimum temp is at least 5-6 celsius. Buy a min-max thermometer to check. You max temp is quite high and you may need to watch that your plants do not get scorched. I would try tomatoes, capsicum, cucumber (outdoor variety should do OK), spring onions, basil, and other herbs. You can use the GH as a coldframe to start off other crops, e.g. marrow, beans, cabbage, squash, etc. After the first season you may have a better idea.

From Youtube

The Greenhouse Effect :vid was from: www.3media.co.uk thanks to 3media b friendly to our earth! thats a vid clip i used for my project i think its gud! so i post this out.. ^-^

A Climate Minute - The Greenhouse Effect :The 'Greenhouse Effect' discovered in 1824 by Joseph Fourier is what keeps the earth from being a frozen ball in space. Without greenhouse gases (GHG's) the temperature of earth would be below freezing and incapable of supporting life as we know it. It is precisely because GHG's other than water are such a tiny fraction of the atmosphere that adding a little more can have a large effect on the climate system of earth. Reviewed by Ralph Keeling (scripps.ucsd.edu written & narrated by John P. Reisman