what do you understand by green house effect?

Answer 1

The green house effect is a natural process of the heating of the planet.

The green house effect is part of the radioactive report of earth. It is caused by the green house effect gas (GES) contained in the atmosphere, that is to say, mainly the water foam, carbon dioxide CO2 and methane CH4.


www.acmecompany.com/Pages/stock_earth.html


The green house mechanism

When the rays of sunlight reach the earth atmosphere, part of them (about 30%) are directly reflected, through the air, clouds and earth surface (in particular oceans and iced regions such as Arctic and Antarctic), it is the albedo. The atmosphere absorbs the rays, which were not reflected in the space, by the green house gases (20%) and the earth surface (50%).

This part of rays absorbed by the earth brings warmth, which is in turn directed in the atmosphere in the form of infrared rays, it is the black body radiance. This one is then absorbed in party by the green house gases, with the energy received directly from the sun. Then, the heat is redirected in every direction, in particular towards the earth.

This radiance which is redirected to the earth, is the one that created the green house effect, it is the origin of the supplemental supply of heat to the earth surface. Without this phenomenon, the average temperature on earth will do down to –18 degrees Celsius.




ww.environmentalsociety.ca/issues/climate/international-issues.html



atlas.gc.ca/site/english/maps/climatechange/figure_4.jpg/image_view


The green house effect gases

The green house effect gases, which physical properties such as their presence in the earth atmosphere contribute to the green house effect at the surface of earth. The main greenhouse gases are water foam, carbon dioxide, methane, nitrous oxide (or azotes protoxyd) and the ozone. Industrial greenhouse gases include the heavy halocarbons (chloride fluorocarbons), CFC, HCFC-22 molecules such as Freon and the perfluoromethane and sulphur hexafluor (SF6).

Approximate anthropical contribution to the greenhouse effects of the main gases (except water foam, figures provided by the Ademe, “Planete precieuse” collection – Alerte aux Climats, 1998).
1. Carbon dioxide : 53%
2. méthane : 17%
3. ozone : 13%
4. 5. 6. Fluor gases : 12%
7. azoth protoxyd : 5%





www.dnr.state.md.us/forests/publications/urban3.html


Emission origin :

1. CO2: the carbon dioxide is liberated when fossil energies are burnt (petrol, carbon and natural gas) to produce energy and for transportation. The massive destruction of tropical forest aggravates the problem. Forests and oceans, which normally recycle the Co2, can only absorb half of the CO2 produced by men each year. The other half is accumulated in the atmosphere.

2. Methane: it comes from the breeding of ruminants, rice culture, garbage dump and exploitation of petrol and gas.

3. Ozone comes from the transformation of exhaust gases

4. 5. 6. Fluor gases (essentially 3) are used as freezing liquids for air-conditioners and as inflating agents for expensed foam

7. The azoth protoxyd (N2O) is liberated in particular by agricultural fertilizers..


http://adaptation.nrcan.gc.ca/posters/articles/bc_03_fr.asp?Category=hs&Language=fr&Region=on


The human activity

Most of the greenhouse gases come from the nature. But some of them are only produced or aggravated by men through their activities. This is the case in particular for the ozone (O3), of CO2 and methane.

The ozone is provided in great quantities by the human industrial activity, but the CFC which are still largely used, destroy the ozone, which causes a double phenomenon :

An accumulation of ozone in the troposphere above the industrial regions,
A destruction of ozone in the stratosphere above the poles.



library.thinkquest.org/C003763/index.php?page=planet07


The combustion of fossil carbons such as carbon, lignite, petrol or natural gas (methane) throws out Co2 in big quantity in the atmosphere. Only half of it is recycled by the Nature, and the other half remains in the atmosphere, which increases the greenhouse effect. Consequently this means to say that electricity productions with nuclear combustible are a ‘clean’ production because it does not produce any greenhouse gas.

Human activities create lots of GES: Scientifics study the climate thinking that the increase of anthrophical gases is causing warmth of the planet. Greenhouse effect gases are as if a blanket cover was maintaining a warm temperature to the surface of earth and prevent it from cooling down.


users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/CarbonCycle.html


Consequences for the environment

This does not mean that the greenhouse is, by definition, harmful to the ecosystem: without it, the temperature on earth will be approximately – 15 degrees Celsius. However an excess in green house gases could be harmful.

The increase in temperature will first cause a mechanical increase of the volume of sea water caused by the dilatation and melting of glaciers (not icebergs), which will flood part of the grounds (the Coralline island, such as Maldives islands which will be the first threatened), would put in danger a lot of species and could be the cause of the disappearance of the first ‘lung’ of the planet: the phytoplankton (producing 80% of the oxygen on earth and absorbing a good part of the carbon dioxide…) Other consequences such as the increase in pluviometry and a change in sea streams could be disastrous. Other consequences more or less difficult to foresee, risk of creating a true change in the climate.

Scientists see that an increase of 1.5 to 6 degrees Celsius for this century, supposing that the increase of green house gases continue to increase at the same rhythm. A total stop of carbon production will not prevent the increase of average temperature on earth for the next ten years even hundreds year. The green house gases disappear from the atmosphere very slowly.

However, some specialists, while admitting that the changes inducted by the water increase and the need to take measures, do not believe in the actual catastrophism. For instance, in the case of the Maldives islands which are coralline islands, they precise that the corals are able to heighten faster than the water increase and as a consequence the islands would not disappear. Species will certainly regress or disappear, but other will appear and develop thanks to the natural selection and a better adaptation. The history of earth show that there has been in the past periods where temperatures were higher and other periods where they were lower, and that each time, nature found appropriate solutions, even if they were terrible. Other see that this happened on a period of thousands of years, and that in the case of the green house effect, this will be produced in the space of one or two centuries, which will be really too fast for the nature to adapt.

The carbon cycle :


users.rcn.com/jkimball.ma.ultranet/BiologyPages/C/CarbonCycle.html


Green house effects and Gulf Stream

Jeudi 1er décembre 2005

See detailed article : disturbance of gulf-stream (wikikpedia encyclopedia).


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What is the climate disturbance?


Scientifics (climate specialists) now all agreed: the global warning is ongoing, and at a worrying growth. This means that if we continue like this, the earth will react brutally, with canticles, hurricanes, and storms, stronger and stronger, more and more frequent. There is a risk to have ‘storm seasons’.

[ cf See the Statutes, article 3, Preamble: ]

The influence of human activity on the climate change has been proven. The diagnosis of the association is based among other things on the works of the GIEC. In 2001, these scientific authorities concluded that a phenomenon of the climate change caused by the human activity was putting in danger the balance of the planet. It has been estimated that in 2100, the temperature could be raised of 1 to 6 degrees Celsius. If no radical measure has been solidarity taken at the beginning of this century, irreversible climatic phenomenon will put in danger life on this planet.

All of this is really interesting, but what say the bravest of us all? First of all, we need to understand what this is all about. We do not mean going backwards to the old time of cave men. We can talk about pollution but also the impact on nature. Like any activity (animal, vegetal…) the human activity has an impact on nature and leaves a trace. Finally, we can convey that men can develop activities only up to a certain point where earth could support. Specialists have determined that earth could absorb 3 billions of t.e.c. (Tons equivalent carbon) per year. Why t.e.c. ? Because there are several green house gases. The carbon equivalent is a common measure to all gases. What can earth support without promising a climatic deluge within the next 10 years? 3 billions of t.e.c. We currently emit 6 billions of it, which means twice too much.


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We have the right to 500 kg per year. What is this ?

500 kg = it is the quantity of carbon equivalent (e.c.) that every person can emit per year without damaging for the global balance of the planet.

Why carbon equivalent? Because there are different gases which are responsible for the green house effect. In order to make comparisons, one has to determine the equivalences between each effect of gas, and finally choose a unit. In general, one counts either in carbon equivalent, either in CO2 equivalent. This is not the same thing! 1 kg of carbon = 3.55 kg of CO2.

500 kg of carbon equivalent = from 5 to 500 kg of manufactured products (example: 1.5 PC with flat of a weight of 3.4 kg approx.) Per year! It goes very very fast.
500 kg d'éq. carbone = 8 000 km on the road with a small car.
500 kg d'éq. carbone = 1 000 to 2 000 km in urban zone with a monospace or a 4X4.

500 kg d'éq. carbone = 5 000 km in urban zone with a small car (6 month of average circulation in the Parisian region).

500 kg d'éq. carbone = 250 000 km by train (in France, the less polluting network in the European Union)

500 kg d'éq. carbone = 25 000 km by train (in Great Britan, the less polluting network in the European Union to 15)

500 kg d'éq. carbone = 20 000 km by bus

500 kg d'éq. carbone = 8 000 km by long-distance aircraft (each passenger creates the emission of 500 kg carbon equivallent).

500 kg of carbon equivallent= 5 000 km by short-distance aircraft (one way Paris New-York)

500 kg of carbon equivallent= 2 tons of cement (construction of a modern house of 100 m2 requires 10 tons)

500 kg of carbon equivallent= 5 000 kWh in France, Suède ou Suisse (nuclear and hydroelectricol electricity) (a house of 80 m2 with all electrical equipment will use approximately 8 to 10,000 KWh)

500 kg of carbon equivallent= 666 kWh in Great-Britain (30 % of electricity of nuclear origin)

500 kg of carbon equivallent= 500 kWh in Denmark (origin : carbon for the most part, 10% eolian)

500 Kg of carbon equivallent= 680 liters of domestic fioul (heating of houses)

500 Kg of carbon equivallent= 1 000 m3 of gas (the heating of a 100m2 house requires approximately 2,000 m3 per year)

500 kg of carbon equivallent= 1 600 liters of milk

500 kg of carbon equivallent= 17 000 eggs

500 kg of carbon equivallent= 700 kg of fish and chicken

500 kg of carbon equivallent= 45 kg of veal

500 kg of carbon equivallent= 125 kg of beef

500 kg of carbon equivallent= 500 kg of emptied chicken

500 kg of carbon equivallent= 450 kg of pork

500 kg of carbon equivallent= 166 kg of cooked cheese

500 kg of carbon equivallent= production of 6,25 tons de wheat (gross)

500 kg of carbon equivallent= 5 tons of wheat flour

500 kg of carbon equivallent= from 125 to 167 kg of fruits amd vegetables imported by plane (8 000 km)

500 kg d'éq. carbone = 10 to 20 tons of fruits or vegetables imported by truck

500 kg of carbon equivallent= 50 to 100 tons of fruits or vegetables locally produced.



Sources :

" L'effet de serre ", de J-M JANCOVICI & H. LE TREUT, Champs Flammarion, Paris, 2004. Méthode de calcul dite du " bilan carbone ", mise au point pour l'Ademe (Agence de l'environnement et de la maîtrise de l'énergie, établissement public français sous tutelle des ministères de l'Industrie, de la Recherche et de l'Ecologie).

J-M Jancovici's website : http://www.manicore.com.




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Individual carbon credit = 500 kg; it is your turn to compose your basket


1 kg of manufactured products = from 1 to 100 kg of carbon equivalent (example: to reach you, a micro-computer with a flat screen of 3.4 kg required the emission of 340 kg carbon equivalent)

100 g of manufactured products = 100 g to 10 kg of carbon equivalent

1 km on the road with a small car = 63 g of carbon equivalent

1 km in the city with a monospace or a 4X4 = 250 to 500 g of carbon equivalent

1 km in torn with a small car = 100 g of carbon equivalent

1 km by train (in France, the less polluting network in the whole EU) = 2 g of carbon equivalent

1 km by train (in England, the less polluting network in EU to 15) = 20 g of carbon equivalent

1 km by bus = 25 g of carbon equivallent

Answer 2

Visible rays have higher wavelength, so they can penetrate glass.
Rays (talking of sunlight) then get absorbed by the surrounding inside the glass/transparent covering and convert to heat.

This heat waves have lower wavelength and they can't penetrate glass.

So the heat is trapped inside, and this way we can build the green house effect.

Usage: In cold climate, to provide proper temperature to plantations, we use the greenhouse effect.

Additional info:
Earth's global warming is also a due to green house effect :(

Answer 3

That believe it or not, the "greenhouse effect" is a very bad name and misleading because the main reason the greenhouse is so war is not because of the glass..but thats at a different level then you are asking.


The atmosphere acts as a greenhouse window. It lets in visible light. The light is absorbed by plants and the ground, it is emitted ans long wave radiation. The atmosphere doesn't let long wave radiation escape, thus the long wave radiation (heat) is sent back to earth. Meaning the atmosphere is trapping heat and warming the earth higher than it normally would be.

Answer 4

Building A Greenhouse Plans Easiest!

Answer 5

Greenhouse gases blocking some of the infrared radiation that came to Earth as sunlight from leaving. It keeps the Earth at a more-or-less constant temperature, so it's vital for life. The greenhouse effect is NOT the same as global warming. Global warming is when you get an enhanced greenhouse effect because there are too many greenhouse gases so there is too much infrared being blocked.

Answer 6

I understand that is a story the MEDIA uses to scare people into passing laws and regulations that THEY want and which help to line the pockets of people and businesses that support them. For instance, the hype comes out on the news

"OMG, Global warming, we're all gonna die and get flooded cuz the ice caps are melting, OMG we're all gonna DIE!!!!"

Then legislators pass laws to reduce whatever emissions they say are causing global warming.

To comply with the law, many, many businesses have to install such and such filters and new/updated machinery and equipment so they dont emit such and such chemical, say, methane gas.

The companies that build these filters, equipment and machinery get lots and lots of orders because the businesses must comply and buy the new stuff, right?

But they never tell you that the companies that build the filters and equipment and machinery are run by corporate officers that contribute very large sums to the campaigns of these legislators to keep them in office.

So they make tons of money and in turn keep legislators in office which in turn pass laws to ensure that those businesses continue to make lots of money. What a deal.

And the MAINSTREAM medai - major networks - won't tell you that COWS are actually the greatest producer of methane gas.

That may not answer the "greenhouse effect" exactly, but it explains the hype surrounding it.

Answer 7

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Answer 8

Radiant heat can can come right through the atmosphere and heat things up but hot things can't radiate their heat through the 1) water vapor 2) methane and other gasses and carbon dioxide to a lesser extent.

Answer 9

It means the warming of climate due to increasing some gasses like carbon dioxide, CFC, methane etc. that trapped heat from the sun like a Green house. http://www.solutionsams89.blogspot.com

Answer 10

Some of the pollution we omit traps heat in our atmosphere and causes our temperature to rise. Wich is at this very momement causing the Ice at the Artic and Antartic to melt ! Alaska is steadily shrinking ! They have already had to move villages inland cause Alaska is mostly permafrost.

Answer 11

i know that a green house cost a whole lot but it good for the enviornment and peoples health