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Global climate change is a fact, demonstrated by historical evidence about the composition of various gases throughout Earth's history. Global temperature changes over time ("ice ages", "warming periods") Ice core sampling in the Arctic and Antarctic circles give us a record of CO2 and CH4 (methane) levels, as well as nitrogen and oxygen levels. From this information, climatologists can calculate average temperature over time. As far as the evidence shows, the composition of the Earth's atmosphere has stayed essentially the same for the last 800,000 years, as far back as ice core records can show. This composition is the textbook common 78% nitrogen gas, 21% oxygen gas, 1% other (Argon, CO2, water vapor, Neon and Helium). CO2 is of particular importance to the discussion on global warming because experiments have shown it to absorb infrared light (what we feel as radiated heat, by the sun or a fire), and therefore increase the temperature of the atmosphere. It is also known that since the Industrial Revolution, which brought about the common use of fossil fuels, global CO2 levels have nearly doubled.

A:The simple answer is yes: Temperature records show that average global temperatures have risen by 0.75 degrees Celsius since the Industrial Revolution and are now the highest for at least two thousand years, estimated to likely be the highest for at least a million years. And most of this rise has occurred since the 1970s. For the purpose of this question, we do not need to establish why this rise has occurred, but even sceptics acknowledge that carbon dioxide levels have risen rapidly since the Industrial Revolution.

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โˆ™ 2016-03-18 13:11:19
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Q: Does global warming exist
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Related questions

Why does global warming decrease temperatures?

True global warming does not decrease temperatures. So, either the model for global warming's effects is hokus-pokus, or global warming as presently claimed, does not exist. Some global warming followers will have you believe that global warming makes the weather "act crazy". If true, then it is not really global warming, is it.

Does global warming really exist?

Absolutely, no question about it

What doesn't exist but has a name?

A theory. Global warming.

How did global warming exist?

it is a result of human activities

When will global warming strike?

Early stages of Global Warming exist today. For details and warning signs, click on the related link below.

How can science help save global warming?

Science has no interest in saving global warming. Science is a body of knowledge and a system of discovering things. Without global warming life on earth would not exist.

Could life exist without global warming?

Yes. And also with it.

What are the implications of global warming in the Caribbean?

Global warming does exist and if you want some scenarios then there could be hurricanes, and rising sea levels that threaten the Carribbean

What is global warming warming?

The warming caused by Global Warming.

Is it 'global warming' or 'global warning'?

Global Warming.

What job that does not exist today but may exist in future?

In all honesty I think a job that will exist in the future but does not exist today is probably going to deal with Global Warming. A team to think of ways to prevent global warming. A solar weather man because we will be on a diffrent planet.

Is global warming the beginning of the end for life on Earth?

It's possible. If we cannot stop global warming, then the earth will simply get hotter and hotter till no life can exist.

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