Question

What is the approximate percent increase of carbon dioxide in the earth's atmosphere since pre industrial revolution

Answer 1

Global warming gases in the world's atmosphere are rising day by day, with concentrations up 29 percent since the start of the industrial era in 1750.

Emissions of carbon dioxide, the most widespread greenhouse gas, were up 39 percent.The new figures for 2010 from the World Meteorological Organization show that CO2 levels are now at 389 parts per million, up from about 280 parts per million 250 years ago. The levels are significant because the gases trap heat in the atmosphere.It is major grrenhouse gas.

also in new report the global concentration of carbon dioxide in the atmosphere has reached 400 parts per million (ppm) for the first time in recorded history, according to data from the Mauna Loa Observatory in Hawaii.