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How do scientist learn about carbon levels in the past?
The scientist learn about carbon levels that in the atomosphere about carbon dioxide.
Why is the concentration of carbon dioxide rapidly increasing in the Earths atmosphere?
In the past 50 to 100 years, man has burned about one halve of all the oil which formed through the ages, plus large amounts of coal, lumber, and natural gas. This is the source of the carbon dioxide. It would be worse except the oceans absorbed some of the carbon dioxide increase.
What statement best describes how carbon dioxide and Earth and average temperature are related?
Both have increased gradually over the past 150 years.
Why have carbon dioxide levels in the earth fallen?
Carbon dioxide levels have not fallen. They have been gradually increasing for the past 250 years when man began burning fossil fuels and cutting down trees. Since 1980 CO2 levels have increased more rapidly than ever before.
Why have greenhouse gases increased so much in the past 100 years?
There have been a lot of upward trends in the past 100 years - population, industrialization, use of motor vehicles - each of thee contributes to GHG emissions, particularly carbon dioxide. In addition, the deforestation of many areas of the world either through logging, climate shifts or the increasing need for agricultural land has reduced the ability of the eco-system to absorb carbon dioxide. Still in the carbon dioxide sequestration area, changing farming practices have reduced the amount of carbon retained in the soil. Even more, the thawing of much of the permafrost in North America and Europe/Asia has liberated methane, a potent GHG with 21 times the impact of carbon dioxide. Then again there are new GHGs which were not even thought of 100 years ago - substances like CFCs and SF6 - which are very potent GHGs.
How do scientist learn about carbon levels in the past?
The scientist learn about carbon levels that in the atomosphere about carbon dioxide.
Which gas has increased in concentration by about 0.011 percent in the past 150 years?
Carbon Dioxide
How much carbon dioxide emission has increased over the past 250 years?
By 38 percent
How common is carbon dioxide in the air?
Levels of carbon dioxide in the air reached 400 ppm (parts per million) or 0.04% this year (2013). This is the highest level in the past 500,000 years.
In past years were temperature and carbon dioxide usually at the same rate?
Yes, carbon dioxide levels remained at 280 ppm for many thousands of years, together with an even temperature, before the Industrial Revolution.
What are somethings carbon dioxide is used for?
One of the first used of carbon dioxide is to grow plant in greenhouses. In the past CO2 was used for refrigeration and it is coming back to replace freon. It is also used to make dry ice.
Why have levels of carbon dioxide risen over the past billion years?
Less trees, more people, more pollution.
Why is the concentration of carbon dioxide rapidly increasing in the Earths atmosphere?
In the past 50 to 100 years, man has burned about one halve of all the oil which formed through the ages, plus large amounts of coal, lumber, and natural gas. This is the source of the carbon dioxide. It would be worse except the oceans absorbed some of the carbon dioxide increase.
What are the past benefits of fossil fuels?
Fossil fuels (coal, oil and natural gas) were a very valuable source in past, before we realised the effects of their carbon dioxide emissions.
What is the past tense of vary?
varied
What statement best describes how carbon dioxide and Earth and average temperature are related?
Both have increased gradually over the past 150 years.
What evidence is there to suggest that carbon dioxide produced from burning fossil fuels may be linked to Global Warming?
A:People, that is already a long list that [sadly] is getting longer every day.A:Lots of research shows that man-made (anthropogenic) carbon dioxide (CO2) is directly responsible for Global Warming:rise in carbon dioxide levels since the start of the Industrial Revolution (when humans first started to burn fossil fuels on a large scale). Today's levels are much higher than they ever have been in the past 650,000 years;there is an unequivocal relation between man-made carbon dioxide emissions and the measurements of atmospheric carbon dioxide;the proven fact that increased atmospheric carbon dioxide increases global temperature. Observations clearly show the earth is warming;isotope analyses of atmospheric carbon dioxide allows to trace its man-made origins.exhaustive research rule out other greenhouse gasses and/or natural carbon dioxide sources which might cause the current temperature increases/atmospheric carbon dioxide levels.See links below for addtional information/graphs.I think its because carbon dioxide stores heat and the atmosphere holds the co2 on earth.
