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The fact that has occurred in the past serves as evidence that it could be happening now, not against it.

If you mean why is it believed that there is a human element, that us because some models indicate that the current change in CO2 concentration is far greater than others in recent geologic history.

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Q: Why is Global Warming considered true when it has occured in the past before and will occur in the future again also?
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Why did the world deal with ozone depletion before global warming?

The world deals with ozone depletion before global warming. It is because ozone depletion is much fatal.


Reaction of many to global warming?

Well I think that global warming is really scary for people. Because people can't really do things. Do to global warming so they have to try and stop it before it gets worse.Mostly hysterical.


Was the Santa Catarina flood caused by global warming?

most likely not. just because global warming is occurring does not mean that it caused the flood. in the past flood aways happen, not just because of global warming. in my school before the charts were way up, it flooded, not because of global warming, but because the school was built on a filled up marsh.


How much thicker was the ice before global warming?

Thicker than now


What could be categories for a Jeopardy game about global warming in a Daily Double?

Jeopardy had a Global Warming category on February 14 2001 in the double Jeopardy round (See related link) and questions with Global Warming in the clue or answer before and after that date see related link


How does global warming affect society?

Global warming affects society both because we must adjust to it, to the extent that it is now unstoppable, and because we must change our use of fossil fuels in order to minimise further global warming before catastrophic climate changes occur.


What effect does global warming have on the tides?

Global warming will not affect the tides, which are caused by the gravitational pull of the moon. There will be more water in the oceans, of course, so a high tide will be higher than before.


Could governments have done more in the past to prevent global warming?

Yes, we have known about global warming since about the middle of last century, but governments have been slow to act. Politicians rarely can see beyond the next election, and action on global warming takes some years before we see a result. Now, as global warming and its effects are beginning to be more obvious governments may act.


Is the news making global warming sound worse than it is?

Not at all. By giving space to the opposing side, that variously claims that global warming is not happening, is happening but is not a problem, or is happening and is a problem but we have no power to stop it, the news media is unintentionally playing down the problem of global warming. This is a concern for scientists, who say global warming is real but can be stopped if we take decisive action before it is too late.


What are some slogans against global warming?

Why we are using plastic bags in spite of global warmingEarth-please do think about me!"Global warming, a Global warning""Alone we can make a difference , but together we can change the world and protect our mother earth from global warming""We're burning our children's inheritance""Global Warming - A topic that's heating up"There are lots of possible slogans.Let's leave the world in usable condition for the next generation.Let's act now, before Antarctica melts.Global warming is real, the glaciers are already melting.Global warming is going to become a huge problem unless we act now.Global warming is the biggest challenge of the 21st century.If we do not deal with global warming, the human race has no future.Global warming is worse than you think.the world and greenstop,global warming,save your future"I am hot, but the earth should not be!"Use it, then turn it off at the wall.Give a hoot - don't pollute.stop,global warming,save your futureRecycle, for your grandchildren's sakeGlobal Warming Is Global WarningIf you want wood, if you want food, plant trees wherever you could.land is the place to and not water


Whychlorofluorocarbons are considered to be among the worst pollutants?

they stay up there for around 100 years before decaying, and they deplete the ozone layer which is important for life on earth (ozone depletion = global warming)


Is global warming definitely caused by humans or is it a natural event that has happened before?

Global warming has happened before but it happened over many thousands of years. The present global warming is happening extremely fast (200 years) and is definitely being caused by human activity. We can measure the cause, the carbon dioxide in the atmosphere, and we can test to prove it comes from fossil fuels (coal, oil and natural gas).