What is global warming?

Answer 1

Global Warming is the upward trend in global average temperatures caused by natural climate change.

Don’t be too quick to believe the hype that the current upward trend is man-made. My big problem with that idea is that whenever someone starts to talk about man-made Global Warming, they always start lying to you to try and convince you that they are right.

Take the first response, above, from Toffee. She said…

“…temperatures ...have varied less than 1 degree since the dawn of civilisatin…”

(spelling mistake was hers) She then said…


“…a temperature increase of 2C above pre-industrial levels may be a threshold which triggers melting of the Greenland ice cap.”

Hmmm?

But we know that in the Middle Ages there was little or no ice in Greenland because the Vikings had settlements and farms on Greenland that are now under permafrost. So, according to the second quote from Toffee, that would have to mean that, back in the Middle Ages the temperature was at least “2C above pre-industrial levels” (It was actually about 3C above current temperatures.) But how can that be true if the first quote, that temperatures have “…varied less than 1 degree since the dawn of civilisatin” is also true???

Both of those quotes *cannot* be true, so Toffee is lying!

And it happens again and again whenever you read anything from these people.

Don’t believe the hype!

Answer 2

Easy way to look at this. Sounds complicated - dead easy.
Global warming is a concept scientists came up with. Nobody knows for sure. Global warming is extremely severe, be it real.
In the atmosphere, we have us. And there is a layer of greenhouse gases protecting us, in a way. They prevent heat from escaping, but allow heat to enter in. Think of a closed window. You get the heat, but it doesn't go away.
Now - carbon dioxide is a greenhouse gas. It started out okay. But more and more trees are being chopped down for stuff like paper, and we've got cars and factories. Pollution! For example - trees. Trees absorb carbon dioxide. When they are chopped down, they release carbon dioxide into the air. It floats up, and joins its fellows.
But there's too much! There is NO escape of heat at all. Well, soon. Heat is escaping less and less now. And that is a problem because climate changes! It could make rivers warmer, causing fish to die, because that's not what their bodies are made to. They must adjust. In that process, some die. Also Antartica's icecaps will melt. Melting into water, which drops into seas. Ocean level rises! Which means tons of flooding. Another problem is that severe storms would be caused. Think of the damage! List another one? There's also crops. Crops grow at a certain temperature. But when its just hot, and some people don't have money to buy fresh water to sprinkle over crops, crops die. And these poor people starve. What have they got to eat? Nothing!
So you see what I'm saying? That's global warming!

Answer 3

The greenhouse effect - some basics
The earth, like our own bodies, cools or warms until the energy ‘inputs’ from warming (from the sun, for example) are in balance with energy lost through cooling. Greenhouse gases are emitted to the atmosphere when we burn fossil fuels to generate electricity or heat, or to power engines for travel. These gases (principally CO2) trap some of the sun’s energy within our atmosphere – like a greenhouse roof – increasing the temperature at which the earth achieves energy balance.

The root cause?
The main greenhouse gas is carbon dioxide (CO2). This accounts for about two thirds of the human induced warming effect. Methane, nitrous oxide and other gases account for the remaining third.

CO2 levels have risen one third since the industrial revolution and are set to double in the next 100 years; temperatures which have varied less than 1 degree since the dawn of civilisatin, are projected to rise between 1.4 and 5.8 degrees centigrade over the next 100 years - depending on how mankind chooses to evolve civilisation.



The impact?
Swiss re, the reinsurance company, provides an economic impact indicator: losses from natural disasters are doubling approximately every 10 years and could reach about $150 billion in 10 years. In a study of the summer of 1995 in England and Wales, which was about 1.5C warmer than average, it was estimated that net economic losses were about £1.5billion.

The consensus from the 2005 conference of scientific experts was that a temperature increase of 2C above pre-industrial levels may be a threshold which triggers melting of the Greenland ice cap. To have a high probability of not exceeding this 2C limit, atmospheric CO2 concentrations should stay below 400ppm. This may be reached in 10-15 years at the current rate of increase.




Those least able to cope with climate change – developing countries – are likely to be among the most affected. It will further reduce access to drinking water, negatively affect the health of those living in poverty, and will pose a real threat to food security in many countries. If the Greenland ice sheets melts, the sea level rise would be so dramatic that the map of the world would change substantially

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

The greenhouse effect is unquestionably real and helps to regulate the temperature of our planet. It is essential for life on Earth and is one of Earth's natural processes. It is the result of heat absorption by certain gases in the atmosphere (called greenhouse gases because they effectively 'trap' heat in the lower atmosphere) and re-radiation downward of some of that heat. Water vapor is the most abundant greenhouse gas, followed by carbon dioxide and other trace gases. Without a natural greenhouse effect, the temperature of the Earth would be about zero degrees F (-18°C) instead of its present 57°F (14°C). So, the concern is not with the fact that we have a greenhouse effect, but whether human activities are leading to an enhancement of the greenhouse effect.

Answer 6

american inability to accept that the Earth is dying, and the continued introduction of pollution into the atmosphere by american companies in majority.
Sign the bloody Kyoto agreement and start doing something you stupid morons in america, (note the lack of a capital A).
You should be setting an example, but you're so useless you can't even cope when a small typhoon hits you!
Living in Asia we get 50 of these every year.
Your lack of concern for the environment is actually creating the climate change which buggered up one of your cities, you deserve all the crap you get from everyone around the world!

Sorry about that, but none of you has any idea of world events or the future prognosis for the World, which is dire in the extreme..

Answer 7

The usual answer to this is that the CO2 traps the sun's heat.
Why does nobody think about the amount of HEAT produced by burning fossil fuels as well this cannot escape either.
RoyS

Answer 8

The destruction of the protective ozone layer by greenhouse gasses. The main one being CO2. The ozone layer protects us from the suns rays. That`s what`s heating us up.

Answer 9

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Use a reverse phone lookup to:
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https://tr.im/721a7

Answer 10

The planet earth works in thousands of years cycles. getting warmer and colder over the periods. It is now at one of the warmer periods. Nothing to worry about really, except that the labour government are using it as an excuse to rake in more tax.