People Awareness and Global Warming
There has been several answers, answered by people of what is Global Warming?
SWAPNIL:-
Global warming refers to the increase in the average temperature of the Earth’s near-surface air and oceans in recent decades and its projected continuation.
The global average air temperature near the Earth’s surface rose 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the last 100 years. The Intergovernmental Panel on Climate Change (IPCC) concludes, “most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations”[1] via the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from pre-industrial times to 1950 and a small cooling effect from 1950 onward.[2][3] These basic conclusions have been endorsed by at least 30 scientific societies and academies of science, including all of the national academies of science of the major industrialized countries. However, a few individual scientists disagree with some of the main conclusions of the IPCC.
Climate models referenced by the IPCC project that global surface temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100.[1] The range of values results from the use of differing scenarios of future greenhouse gas emissions as well as models with differing climate sensitivity. Although most studies focus on the period up to 2100, warming and sea level rise are expected to continue for more than a millennium even if greenhouse gas levels are stabilized.[1] This reflects the large heat capacity of the oceans.
An increase in global temperatures is expected to cause other changes, including sea level rise, increased intensity of extreme weather events,[4] and changes in the amount and pattern of precipitation. Other effects of global warming include changes in agricultural yields, glacier retreat, species extinctions and increases in the ranges of disease vectors.
Remaining scientific uncertainties include the amount of warming expected in the future, and how warming and related changes will vary from region to region around the globe. There is ongoing political and public debate worldwide regarding what, if any, action should be taken to reduce or reverse future warming or to adapt to its expected consequences. Most national governments have signed and ratified the Kyoto Protocol, aimed at reducing greenhouse gas emissions.
BOB:-
Some gases (”greenhouse gases”) let sunlight in, which warms the Earth, and then block that heat from leaving. That’s the “greenhouse effect”, and it’s a natural thing, mostly caused by water vapor.
Man is making excessive amounts of greenhouse gases, mostly by burning fossil fuels. That causes the delicate natural balance to go out of whack and the Earth warms. That’s global warming.
It won’t be a Hollywood style disaster. Gradually coastal areas will flood and agriculture will be damaged. But it will be very bad. Rich countries will cope, but it will take huge amounts of money. In poor countries many people will die of starvation, but not all of them.
Most scientists say, in 20-50 years. But we need to start right now to fix it, fixing it will take even longer than that.
Really good website for more information here:
profend.com/global-warming
Lots of numerical scientific data proving it real here:
en.wikipedia.org/wiki/Image:Clima..
ipcc.ch/SPM2feb07.pdf
Proof that most scientists think it’s real and mostly caused by us here:
en.wikipedia.org/wiki/Scientific..
sciencemag.org/cgi/content/fu..
NISHA:-
the level of carbon di oxide in the atmosphere has increased due to pollution also the protective ozone layer is depleting since cholro fluro carbons is released from refrigents. All this has led to a rise in temp and melting of ice. slowly coastal areas wil get submerged in the process.
SMOKEY:-
Global Warming is a lie. It is a natural cycle the earth is going through. What if Al Gore was around right before the ice age? He’d be predicting global cooling.
DARTH:-
Global Warming is the natural/human related warming of the earth. It’s both natural and man made.
Here is the basic of how it works.
1. The suns radiation comes down to earth.
2. The suns energy is either absorbed and what doesn’t get absorbed is reflected back into the earths atmosphere.
3. If there wasn’t any global warming then the earth would be colder. As the radiation goes up into the atmosphere it gets trapped by greenhouse gasses. But since we are making loads more greenhouse gasses, more and more heat is staying in the earth atmosphere causing it to warm up.
4. Global warming is earths way to keep itself warm but were putting too many greenhouse gasses into the atmosphere messing up the cycle.
REDROSEA:-
According to
edu.pe.ca/eastwiltshire/grass…
Global warming refers to the increase in average ground temperatures on earth. These higher temperatures across the planet are caused by an intensification of the “greenhouse effect.” Before recent scientific inquiries into this phenomenon, the greenhouse effect simply referred to the natural process by which the earth’s atmosphere traps heat and warms the planet to a livable temperature. This heat trapping, however, has begun to escalate to possibly dangerous levels. Scientists have attributed this escalated greenhouse effect to the collection of burning fossil fuels (the gas we use in our cars and other machinery), chemicals and other
pollutants that wind up in our atmosphere. It is a serious problem and the results of global warming are significant. Levels of carbon dioxide in our atmosphere have increased by 30% over the last century. Extreme changes in weather have become more common than ever.
Some areas of the world have already become as much as 5 degrees Fahrenheit warmer. Most scientists and physicians believe that global warming may be the cause of increased infectious diseases, skin cancer and heat related deaths.
T E M P E R A T U R E
Global temperatures are rising. Observations collected over the last century suggest that the
average land surface temperature has risen 0.45-0.6°C (0.8-1.0°F) in the last century. Since 1979, scientists have generally agreed that a doubling of atmospheric carbon dioxide increases the earth’s average surface temperature by 1.5-4.5°C (3-8°F). More recent studies have suggested that the warming is likely to occur more rapidly over land than the open seas.
R A I N F A L L
Precipitation has increased by about 1 percent over the world’s continents in the last century. High latitude areas are tending to see more significant increases in rainfall, while precipitation has actually declined in many tropical areas.
S E A L E V E L
The warmer temperatures are expected to raise sea level by expanding ocean water, melting mountain glaciers, and melting parts of the Greenland Ice Sheet. Sea level has risen worldwide approximately 15-20 cm (6-8 inches) in the last century. Approximately 2-5 cm (1-2 inches) of the rise has resulted from the melting of mountain glaciers. Another 2-7 cm has resulted from the expansion of ocean water that resulted from warmer ocean temperatures.
A T M O S P H E R E
The temperatures of the Earth and any other planet depend mainly on (1) the amount of sunlight received, (2) the amount of sunlight reflected into space, and (3) the extent to which the atmosphere retains heat. The extent and speed at which humanity changes the climate will depend to a large extent on the rate at which society adds additional greenhouse gases to the atmosphere. Until a few decades ago, energy consumption grew at about the same rate as
the Gross National Product.
G R E E N H O U S E E F F E C T
There is a natural greenhouse effect which keeps the earth warm enough (average temperature about 60°F) to be habitable. Greenhouse gases like carbon dioxide, methane, nitrous oxide, and water vapor trap heat and warm the earth’s surface. Exactly how the earth’s climate responds to enhanced greenhouse gases depends on complex interactions between the atmosphere, oceans, land, ice and biosphere.
Atmospheric concentrations of greenhouse gases have increased significantly since the Industrial Revolution: carbon dioxide +30%; methane +100%; nitrous oxide +15%. Many greenhouse gases remain in the atmosphere for a long time (decades to centuries).
Projected CO2 concentration levels are significantly higher than any observed over the past 160,000 years.