What is global warming?

Answer 1

Global warming is a phenomenon when the greenhouse gas emission has increased while the dissipation of heat is still not changed. Global Warming occurs when the amount of heat that earth retains is more than the normal amount of heat earth can reflect.

Greenhouse gases like Carbon dioxide tend to retain the heat and thus global warming comes in place. The reduction in forest cover also adds onto this.

Answer 2

Global warming is the overall average rise in the earth's temperature over time. It is caused mainly due to the greenhouse effect.

Our atmosphere works like a greenhouse. When heat comes in, not all of it is able to escape again because the wave length of the energy changes. As a result some of that heat is trapped and makes the earth warm. If it was not for the greenhouse effect our earth would be very cold. The problem is that we are intensifying this process with our emissions of greenhouse gases.

It is interesting to note that global warming will not result in it actually being warmer in every place on earth. Some areas may become colder. Remember, it is the OVERALL AVERAGE rise in temperature on the earth.

Answer 3

Due to pollution greenhouse gases such as CO etc are formed which not only mixes with air but also traps the heat forming a layer in the stratosphere increasing the overall temperature across the globe also these gases has depleted the ozone layer which stops the earths harmful UV rays from entering earth thus causing it dangerous place for humans to live in...these things r known as global warming!!

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"[1].

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. [2]

The measure of the response to increased GHGs, and other anthropogenic and natural climate forcings, is climate sensitivity. It is found by observational [3] 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. [4]. 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.

You could get more information from the link below...

Answer 5

This is a very complicated question Venk....Our mother Earth has been warming for centuries, hundreds, thousands of years. We're if fact helping it, with the carbons we put in our atmosphere. These carbons help to hold the warmer particles of moisture, air or atoms, keeping the air warmer than nature intended. Slowly it compounds itself, one becoming warmer then the other, continuing until the trapped air moves into unwanted places like the artic and sub artic regions. Soon the trapped ice (bergs) began to melt, slowly at first than as I stated compounding itself, faster.
We can actually see it today as the ice bergs in the arctic are melting at an alarming rate. It's believed this is what happen to New Orleans when the ocean surge came over the levees, the rising oceans, etc.
Go to National Geographic.com to learn more about the Warming climate and the melting ice caps.Good studying.

Answer 6

The rise in temperature that results from increasing atmospheric concentrations of carbon dioxide . This increase has become one of Earth's most predictable environmental trends. This will alter every econsystem on Earth. The scientists attribute the accelerated ice melting to a regional rise in average temperature of some 2.5 degrees celsius since 1940. If we do not take measures to control this situation, our planet may bcome freezing, barren, lifeless place similar to Mars. The greenhouse gases keep the surface warm because as incoming solar radiation strikes Earth, the surface gives off infrared radiation, or heat, that the gases temporarily trap and keep near ground level

Answer 7

Global Warming:

Global warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate.

A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans.

When scientists talk about the issue of climate change, their concern is about global warming caused by human activities.

Answer 8

Global warming means that we are polluting the environment, especially with industries putting lots of tons of carbon gases in the air which is destroying the several protection layers of our athmoshere. As a result, sun rays enter our planet almost unfiltered causing havoc on our weather, our state of health and of course it has also bad effects on the animals and plants. So, as it gets warmer and ultraviolet (UV) rays are not to be kept away on a healthy level any longer, sea levels will rise which will shorten the places to live on, and it will be much harder to find food and drinking water. Especially when these goods are polluted in some other way as well as carbon gas emmisions are by far not the only aspect of pollution. Think of waste etc.

Answer 9

Global Warming is one of the biggest fakes ever. 3/4 of the Earth is water. To heat the "globe " would take years (10000) at least It's just a way for the government to control us more

Answer 10

It is the increase in temperature of atmosphere due to increase in the concentration of gases like CO2,CH4,CFC's etc....which depletes the ozone layer&melts the polar ice belts.It is caused mainly due to industrialisation,urbanisation etc.....