What is Global Warming?

Answer 1

Rising climates of the world due (mainly) to nonpoint pollution. The theory of glaciers melting would result in a giant global flood.

Answer 2

The term "global warming" is a specific case of the more general term "climate change" (which can also refer to "global cooling," such as occurs during ice ages). In principle, "global warming" is neutral as to the causes, but in common usage, "global warming" generally implies a human influence. However, the UNFCCC uses "climate change" for human-caused change, and "climate variability" for other changes. Some organizations use the term "anthropogenic climate change" for human-induced changes.

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.

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.

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.

Answer 3

Population of the World

in 1800 was 900 million
in 1900 was 1.6 billion
in 2000 was 6 billion
in 2005 was 8.5 billion

now, what is fueling global warming?


ps: in the 1980's one-half of all the people who had ever lived on the earth - were ALIVE at that time!

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 current scientific consensus is that "most of the observed warming over the last 50 years is likely to have been attributable to human activities'.The extent of this consensus was the subject of a study—published in December 2004 in the journal Science—that considered the abstracts of 928 refereed scientific articles in the ISI citation database identified with the keywords "global climate change". This study concluded that 75% of the 928 articles either explicitly or implicitly accepted the consensus view — the remainder of the articles covered methods or paleoclimate and did not take any stance on recent climate change.

The primary causes of the human-induced component of warming are the increased amounts of carbon dioxide (CO2) and other greenhouse gases (GHGs). They are released by the burning of fossil fuels, land clearing and agriculture, etc. and lead to an increase in the greenhouse effect. This effect was first described by Joseph Fourier in 1824, and first investigated quantitatively in 1896 by the Swedish chemist Svante Arrhenius,although the greenhouse effect did not enter into popular awareness until the 1980's.

Climate sensitivity is a measure of the equilibrium response to increased GHGs, and other anthropogenic and natural climate forcings. 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 2001 IPCC report estimates a likelyhood between 66% and 90% for a climate sensitivity in the range 1.5–4.5 °C (2.7–8.1 °F). This should not be confused with the expected temperature change by a given date, which also includes a dependence on the future GHG emissions and a delayed response due to thermal lag, principally from the oceans. Models referenced by the Intergovernmental Panel on Climate Change (IPCC), using a range of SRES scenarios, project that global temperatures will increase between 1.4 and 5.8 °C (2.5 to 10.5 °F) between 1990 and 2100.

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 implementation of policies that deal with predicted consequences, what, if anything, should be done to reduce or reverse future warming, and how to deal with the predicted consequences.

Answer 5

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 [1].

Answer 6

When the hole in the ozone layer get bigger/wider because of polution (eg, CO2 emmissions) so that the Earth's protection from the intense heat of the sun lessons. The Earth gets gradually hotter until, i suppose, we all die either from the heat or from the sun or the icebergs melting and flooding all the land.

Answer 7

You must see the picture, "An inconvenient truth".

Answer 8

There is no such thing

Answer 9

our punishment for being ***-holes