Why is carbon dioxide in the atmosphere increasing?
The burning of fossil fuel (coal, oil and natural gas), as
well as deforestation.
Carbon dioxide levels in the atmosphere remained relatively
constant in the range 260-280 parts per million (ppm) over long
periods before the Industrial Revolution, falling as low as 180 ppm
during periods associated with the Ice Ages, but never rising above
Since the Industrial Revolution, and particularly since about
1970. carbon dioxide levels have risen rapidly, to reach their
current level of over 390 ppm. This is the result of human
activity, mainly from burning fossil fuels (coal, oil, and natural
gas) but also from deforestation and cement manufacture.
Almost every reputable scientist ties the increase in man made
(or generated) carbon dioxide to the increased retention of heat in
the Earth's atmosphere which is causing accelerated climate
Because factories are putting it out and cars and trucks are run on
The single largest factor for increasing atmospheric CO2 is the
burning of fossil fuel. Human beings release 30 billion tons of CO2
into the atmosphere each year from fossil sources. Over the decades
this has lead to an increase from 280 parts per million to now over
390 ppm of CO2.