What percentage of CO2 is required in the atmosphere to make it trigger warming?

Question

What percentage of CO2 is required in the atmosphere to make it trigger warming?

Answer 1

actually it´s counted on ppm

We won´t be able to stop the warming but just able to avoid the worst by dampening it (if our calculations are correct).

It is commonly accepted that CO2 concentration should not exceed 500ppm (parts per million)

Answer 2

The amount of CO2 in the air has recently gone from .00028% to .00038%.  And temperatures have gone up about 0.6 degree C because of it.

http://www.globalwarmingart.com/wiki/Ima...

http://www.globalwarmingart.com/wiki/Ima...

Answer 3

CO2 does not cause warming ,98% of it has already been removed from our air by plants . That is the way God set things up .We need the plants just as much as they need us. CO2 is very heavy and is right on the ground. It is so heavy it is used in fire extinguishers. With it on the ground so it could kill us ,no that is where the plants are. The correct level of oxygen is 20.9% and if CO2 were to increase until oxygen dropped to below 19.5% u would pass out. That is why people die in fires even if the fire dept. got there in time the person could suffocate from CO2.

Answer 4

Runaway greenhouse effect?  There are many things that contribute to global warming.  What is earth's albedo?  Albedo is brightness--the amount of light reflected.  Clouds reflect light.  Ice reflects light.  When the ice melts, there is less surface to reflect light.

Carbon dioxide traps heat, but methane is something like 1000 times better at trapping heat.  Increasing atmospheric carbon could trigger a release of methane gas trapped in arctic tundra, leading to a runaway greenhouse effect.  There are probably counterbalancing mechanisms, however, because the earth has clearly undergone periodic ice ages.

What we know is that we have doubled the atmosphere's carbon content in the past 50 years.  Based on careful, independent models, it appears our influence upon global warming is about 80%, the other 20% being due to natural causes such as solar radiation, orbital cycles, and natural environmental change.

Change is inevitable.  We just want to take precautions against especially harmful change.  40 years ago we quit pouring mercury and other toxins into our rivers.  We cannot quit burning fossil fuel overnight, but we ought to carefully consider conservation policies--and we should have begun these efforts a decade ago.

Answer 5

alot!!! we already use alot...and warming is already happenin...we can slow it down...but not stop it:'(