Please explain about global warming, its causes and remedies.?

Answer 1

Not room enough here. Go to www.climatecrisis.net for a great rundown on the whole question, and some constructive answers, too!

Answer 2

The average earths temp. is controlled by the Sun. Sun spot activity change solar wind which in turn affects the amount of cosmic rays that reach the earth. The cosmic rays affect the amount of clouds and the amount of cloud cover affects how much of the suns heat is reflected back out into space. So sun spot activity + how much heat is actually put out of the sun cause average temp changes on the earth. The remedy (assuming it is a problem in the first place) is to wait for a change in the solar activity and the trend will reverse itself and start all over again.

Answer 3

As the Earth spins each day, the new heat swirls with it, picking up moisture over the oceans, rising here, settling there. It's changing the rhythms of climate that all living things have come to rely upon.

What will we do to slow this warming? How will we cope with the changes we've already set into motion? While we struggle to figure it all out, the face of the Earth as we know it—coasts, forests, farms and snow-capped mountains—hangs in the balance.

Greenhouse effect

The "greenhouse effect" is the warming that happens when certain gases in Earth's atmosphere trap heat. These gases let in light but keep heat from escaping, like the glass walls of a greenhouse.

First, sunlight shines onto the Earth's surface, where it is absorbed and then radiates back into the atmosphere as heat. In the atmosphere, “greenhouse” gases trap some of this heat, and the rest escapes into space. The more greenhouse gases are in the atmosphere, the more heat gets trapped.

Scientists have known about the greenhouse effect since 1824, when Joseph Fourier calculated that the Earth would be much colder if it had no atmosphere. This greenhouse effect is what keeps the Earth's climate livable. Without it, the Earth's surface would be an average of about 60 degrees Fahrenheit cooler. In 1895, the Swedish chemist Svante Arrhenius discovered that humans could enhance the greenhouse effect by making carbon dioxide, a greenhouse gas. He kicked off 100 years of climate research that has given us a sophisticated understanding of global warming.

Levels of greenhouse gases (GHGs) have gone up and down over the Earth's history, but they have been fairly constant for the past few thousand years. Global average temperatures have stayed fairly constant over that time as well, until recently. Through the burning of fossil fuels and other GHG emissions, humans are enhancing the greenhouse effect and warming Earth.

Scientists often use the term "climate change" instead of global warming. This is because as the Earth's average temperature climbs, winds and ocean currents move heat around the globe in ways that can cool some areas, warm others, and change the amount of rain and snow falling. As a result, the climate changes differently in different areas.

Aren’t temperature changes natural?

The average global temperature and concentrations of carbon dioxide (one of the major greenhouse gases) have fluctuated on a cycle of hundreds of thousands of years as the Earth's position relative to the sun has varied. As a result, ice ages have come and gone.

However, for thousands of years now, emissions of GHGs to the atmosphere have been balanced out by GHGs that are naturally absorbed. As a result, GHG concentrations and temperature have been fairly stable. This stability has allowed human civilization to develop within a consistent climate.

Occasionally, other factors briefly influence global temperatures. Volcanic eruptions, for example, emit particles that temporarily cool the Earth's surface. But these have no lasting effect beyond a few years. Other cycles, such as El Niño, also work on fairly short and predictable cycles.

Now, humans have increased the amount of carbon dioxide in the atmosphere by more than a third since the industrial revolution. Changes this large have historically taken thousands of years, but are now happening over the course of decades.

Why is this a concern?

The rapid rise in greenhouse gases is a problem because it is changing the climate faster than some living things may be able to adapt. Also, a new and more unpredictable climate poses unique challenges to all life.

Historically, Earth's climate has regularly shifted back and forth between temperatures like those we see today and temperatures cold enough that large sheets of ice covered much of North America and Europe. The difference between average global temperatures today and during those ice ages is only about 5 degrees Celsius (9 degrees Fahrenheit), and these swings happen slowly, over hundreds of thousands of years.

Now, with concentrations of greenhouse gases rising, Earth's remaining ice sheets (such as Greenland and Antarctica) are starting to melt too. The extra water could potentially raise sea levels significantly.

As the mercury rises, the climate can change in unexpected ways. In addition to sea levels rising, weather can become more extreme. This means more intense major storms, more rain followed by longer and drier droughts (a challenge for growing crops), changes in the ranges in which plants and animals can live, and loss of water supplies that have historically come from glaciers.

Scientists are already seeing some of these changes occurring more quickly than they had expected. According to the Intergovernmental Panel on Climate Change, eleven of the twelve hottest years since thermometer readings became available occurred between 1995 and 2006.

Answer 4

The previous answer is a very good one and is factually accurate leaving little further to be added.

A website I created specifically addresses the two points you raised so if you require further details please see...

Causes - http://profend.com/global-warming/pages/causes.html
Remedies - http://profend.com/global-warming/pages/combat.html

Answer 5

get Bob or Envirodude or Trevor ,or Engineer to tell you the scientific data ,I will give you the agricultural side
WHO OR WHAT IS TO BLAME

Irresponsible Agriculture , expanding populations and its effects are the planets biggest enemies.

This text only covers some aspects of Climate change ,i.e.effects of deforestation and subsequent man made desertification ,because of irresponsible farming using chemicals ,over pumping carbon aquifers,over grazing ,wild fires (because of slash and burn gone out of control).

Water and air polution ,such as caused by
industrial contamination ,the contaminating effects of the cities(the internal combustion engine) ,are other stories.

All of these are also man made ,such as the high industrial chimneys pumping contamination into the clouds and the burning of tires,some of this polution has been found in the ice in the polar regions.

There are natural cycles in the planets life
but a lot is influenced by mans existance ,this is increasing with overpopulation,putting strains on Natural resources and increasing contaminations .

The thinner ozone layer helps to speed this up. This is caused mainly by air polution ,also as a result of mans actions.

In North Africa,India,Mexico ,millions of people are effected by land loss , desertification and some have died as a result.

Now many animals are becoming sick because of changes in temperature .
Vital links in the food chains are disapearing affecting other species further along in the chain .

We are witness to a mass exstinction ,for the first time since the dinosaurs.
Of the earth's estimated 10 million species, 300,000 have vanished in the past 50 years.
Each year, 3,000 to 30,000 species become extinct.

Everything is happening so fast it is not possible to monitor things any more.

The Sahara is growing by 7 kilometers a year.
Most of the desserts are as a results of mans actions.And they are increasing .In the dinosaurs days ,there were few desserts.

Collectively this planet is drying up .

Each degree rise in temperature means 10%crop loss

There is less and less water (because of deforestation),to irrigate Agriculture.

Arable lands and their farms are lost all over the globe. Many farmers sons abandon farming and head for the cities.

Northern China is drying up, what once were millions of food producing people, are now hungry refugees ,running for their lives from the all consuming dust storms.

This will have a great effect on world food prices when they start buying at what ever cost, to feed their people.

The farmers that are left have to feed some 70 million more people than the year before but with less topsoil(because of desertification and irreverible erosion)

Over the last half century,
Population growth & rising incomes have tripled world grain demand from 640 million tons to 1,855 million

In the near future the global farming community will not be able to feed every body ,food prices will continue to rise. .

RISING SEAS
The northpole is melting ,and we will know it without ice in our life times.
This does not affect the sea level ,because it is ice that is already in the water.but the melting ice from Green land and the south pole ,and the Glaziers is potable water lost forever and rises the sea levels.

Are We responsible ?
Is it the Sun?
Is it God who wants to punish us?
Is it Gaia who wants to clean some parasitic infestation?
Is it a Natural cycle?

Who cares ? that is not important any more
WHAT IS important -is that we are gonna be in trouble

WHAT CAN WE DO????????????????

The best we can do as individuals is be more responsible ,in our own neck of the woods

Organise well publicized clean up parties ,talk on the radio,hold citizan meetings, get the shools involved to plant trees and listen to environmental awareness talks.

If you do any cleaning up ,leave signs behind saying who cleaned,why and ask people not to start dumping rubbish again ,leave a hole or bins ,in case people come back with trash ,and they always do.

We have done a lot of comunity cleaning and if you dont leave alternatives or try to work on peoples guilt feelings (some people actually have those ,but not many) ,than your efforts are a waste of time.

That is what we do in Mexico.

POSITIVE ACTIONS
Print Tshirts with slogans ,hang posters all over the place (with recycled paper if possible).

Classify trash, take out all the organic waste and make compost with it ,the worst you can do is throw it with the trash,or burn it .

70% of contamination is due to organic waste that is mixed in with the garbage .
and it is just as bad in the sewer where it helps to breed rats and in the landfill it poisons the ground .

This is the easiest to take care of .

First of all we have to clasify trash ,at least keep the organic to one side ,like in a plastic bin with a lid .

If you got a few meters of ground ,you only need 1 or 2 square meters in a shallow hole ,(in the shade) ,that you can wet now and again .

Where you dump everything that is organic .
Toilet paper,bones vegetable cuttings ,eggshells,
deadbodies ,excrement ,cardboard,leaves,
shredded paper,old clothes (if they are organic),

Cover regularly with leaves or a piece of plastic,
to keep humid and to hide any smell .
REGULARLY spray some water over it ,but do not saturate it or the worms will die or leave.
The worms will decompose the wastes, turning it into beautifull black soil for the garden of flower pots .

If you are in a apartment ,if you have a balcony get a big plastic bin drill some holes in the side and lid ,

and add a few buckets of sand now and again to put over the trash ,you should realy stir or move the stuff at times to airate it ,and ensure that the decomposition is even ,keep moist

this rubbish does not get big very fast and the thing works for a long time with out getting full

----------------------Some more Positive thoughts
Global warming cannot be stopped but being friendlier to our Environment cannot be bad and maybe we buy some time.

If you want to help the planet ,plant a tree every week ,if everyone on the planet did we we would be able to slowdown the destructive processes.

Reduce carbon emisions,and they are already working on that ,by alternative forms of energy We need more regulations on carbon production.
Dont use aerosol cans,
Dont burn trash
Limit water use
Recicling wastes.

AGRICULTURE must invest in
Waterharvesting projects ,(such as thousands of small dams).to redirect over ground waterflows from the rains into the ground to supply subteranian water supplies.

Assist the capture of carbon and the production of water by promoting Reforestation.

The world bank pays large subsidies for reforrestation to capture carbon and the best tree for this is the Pawlonia .

Agricultural education and improvements to follow the principals of sustainability and soil management

GOVERNMENT
The protection of existing forrests.
Stop building more highways,
Urban planning to include vegetation
Stop building cities encourage people to return to the land to conduct their business from there ,which now has become possible thanks to the internet.

More environmental or land ,design to prevent bush fires,such as--fire breaks .
More dams,regulations and control for public behaviour.
Alternative effeciant public transport to discourage the use of the internal conbustion engine.

SCHOOL SYSTEMS
Education to motivate people to auto sufficiency by building more home food gardens.
Education on environmental awareness.
Education on family planning ,to curb overpopulation.

Here are a 100 more ways
http://www.eco-gaia.net/forum-pt/index.p... Source(s) Lester E Brown is the director and founder of the global institute of Environment in the United states .he has compiled a report based on all the satalite information available from NASA,and all the information that has
come from Universities and American embassies WORLD WIDE ,
his little book--a planet under stress , Plan B has been trans lated into many languages and won the best book award in 2003