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Carbon dioxide levels in the atmosphere in 1910 were around 290 ppm (parts per million). One hundred years later levels are now approaching 400 ppm. This is an increase of 38%.

See a simple graph at the link below.

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11y ago
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14y ago

That depends on how you measure, where you are and what data you use.

The most common method of stating this is to use the 1900 data in Antarctic through glacial samples. This is 278 ppm

The current source is through multiple data points worldwide, which is about 380 ppm

This represents a change in our atmosphere of 0.011% in terms of total concentrations.

Using Greenland data from 1900 glacial sample to present Greenland sample we see no change in CO2 levels.

If we use specific sites, such a Manua Loa we can not go back as far as 1900, but we have seen changes much higher then the 0.011% of our first sample.

In terms of total greenhouse gases, CO2 makes up about 20% of our greenhouse gases. Man produces about 6% of all CO2. Water Vapor makes up the remaining 80% and there are some trace gases that make up the variances.

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7y ago

The level of carbon dioxide has been rising since the beginning of the Industrial Revolution in the early 1800s. Within the last 100 years (since about the time of World War 1) the rate of this rise has been increasing.

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7y ago

Carbon dioxide levels have risen from around 280 ppm (parts per million) to over 400 ppm.

This is largely caused by the burning of fossil fuels (coal, oil and natural gas), which burning releases carbon dioxide that has been underground for more than 300 million years, when the fossil fuels formed.

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7y ago

Carbon dioxide levels have increased from around 280 ppm to over 400 ppm.

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4y ago

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Q: What has the level of carbon dioxide done during the last hundred years?
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