how is global warming calculated? how will it take effect in the near future? what are precautions?

Answer 1

it may be a natural disaster suddenly or gradually we cannot do any thing because it is directly proportional to the greed of the human being he cannot be satisfied on what he earns by destroying mother earth.

Answer 2

Not by anything that mankind can do, no. Despite what an awful lot of people think, there is actually *no* conclusive proof that the rising levels of CO2 in the atmosphere are having any effect on global temperature at all. Most people will refuse to believe that statement, because they've heard it so many times that the believe it to be true, but they are believing it blindly. As I've said, it is *not* a proven fact. As has been mentioned above, analysis of air bubbles in ice core samples demonstrate that actually increases in CO2 in the atmosphere *follow* rises in temperature, not the other way around. It is also entirely possible that all of the observed rise in global temperature could have been caused by the sun. The big problem with the global warming debate is the amount miss-information and downright lies that are getting told. For example, a couple of people on this question suggested that what we need is to increase the number of trees threefold. But trees already cover approximately a third of the land area of the Earth, so what they are proposing would cover almost the *entire* land area of planet Earth in trees. Not really a great idea, as I'm sure you'd agree! And even people who should know what they're talking about are lying/getting it wrong, such as the UN and Al Gore. Oh, and not everyone who says that global warming is not being caused by burning oil and gas are in the pay of the oil and gas companies. Just take a look at my source, for example. Overall, I believe that a lot more study needs to be done before we decide to pay out billions of pounds trying to fix the problem. Or we might just discover that we made a huge mistake and end up plunging ourselves into a sudden ice-age (how does living under a mile thick sheet of ice grab you?)

Answer 3

This is a general question and would take volumes to answer fully. So in an attempt to simplify, global warming is measured in more than the following ways:
temperature, direction, velocity, brine concentration of ocean currents
long term changes in air temperature, pressure, moisture content, patterns of extreme weather
amount of hydrocarbons in the air
amount of ozone in the atmosphere
amount of ultraviolet (and other spectral frequencies) of light that reach the earth in what places
regional geo-meteorological changes
the change in the weather patterns for the years before global warming became an issue--ice cylinders from the poles
...
and this is the short list

How will it take effect?
Agriculture will be the first and likely the hardest hit. Food, in some parts of the world will become scarcer, and disease and political instability will follow. Fuels will become scarce, so that even in the US there may be severe shortages. And this is just a gradual change.
Well, hurricane Katrina is a prime example. The inability of our local emergency agencies to cope with casualties, the disenfranchised, the hungry, possible anarchy...in general the ability of government to cope with severe permutations in civil structure. Pray that FEMA's response to Katrina taught our reps a lesson.

Answer 4

Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades.

The Earth's average near-surface atmospheric temperature rose 0.6 ± 0.2 °Celsius (1.1 ± 0.4 °Fahrenheit) in the 20th century. The prevailing scientific opinion on climate change is that "most of the warming observed over the last 50 years is attributable to human activities".

The increased amounts of carbon dioxide (CO2) and other greenhouse gases (GHGs) are the primary causes of the human-induced component of warming. They are released by the burning of fossil fuels, land clearing and agriculture, etc. and lead to an increase in the greenhouse effect. The first speculation that a greenhouse effect might occur was by the Swedish chemist Svante Arrhenius in 1897, although it did not become a topic of popular debate until some 90 years later.

The measure of the response to increased GHGs, and other anthropogenic and natural climate forcings, is climate sensitivity. It is found by observational and model studies. This sensitivity is usually expressed in terms of the temperature response expected from a doubling of CO2 in the atmosphere. The current literature estimates sensitivity in the range 1.5–4.5 °C (2.7–8.1 °F). Models referenced by the Intergovernmental Panel on Climate Change (IPCC) project that global temperatures might increase between 1.4 and 5.8 °C (2.5 to 10.5 °F) between 1990 and 2100. The uncertainty in this range results from both the difficulty of estimating the volume of future greenhouse gas emissions and uncertainty about climate sensitivity.

An increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precipitation. These changes may increase the frequency and intensity of extreme weather events, such as floods, droughts, heat waves, hurricanes, and tornados. Other consequences include higher or lower agricultural yields, glacial retreat, reduced summer stream flows, species extinctions and increases in the ranges of disease vectors. Warming is expected to affect the number and magnitude of these events; however, it is difficult to connect particular events to global warming. Although most studies focus on the period up to 2100, warming (and sea level rise due to thermal expansion) is expected to continue past then, since CO2 has an estimated atmospheric lifetime of 50 to 200 years. Only a small minority of climate scientists discount the role that humanity's actions have played in recent warming. However, the uncertainty is more significant regarding how much climate change should be expected in the future, and there is a hotly contested political and public debate over what, if anything, should be done to reduce or reverse future warming, and how to deal with the predicted consequences.

there are many ways to reduce the temperature of earth and environment see the following links for details

http://en.wikipedia.org/wiki/Global_warming
http://www.cis.rit.edu/~ejipci/Reports/GlobalWarming.pdf
http://www.epa.gov/climatechange/
http://www.ecobridge.org/content/g_wdo.htm
http://zfacts.com/p/126.html
http://www.moderateindependent.com/v3i10warming.htm

Answer 5

global warming is mainly caused due to rise in CO2 level in the atmossphere. CO2 has capacity to absorb heat and not to radiate it. this is causing the water level of the sea to rise due to melting of ice in the poles.so this can be prevented by planting as much trees as the world can b'coz even if every people in world grow one tree it is enough to reduce global warming.

Answer 6

global warming...can not be calculated like this....the rate of deforestation, the rate of population growth, the rate of use of land and water resources...are all considered during the calculation....

the effect....it depends on the situation....

Precautions:
Stop deforestation.....it will help a lot....promote eco-friendly technologies, etc.