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In addition to the natural fluxes of carbon through the Earth system, anthropogenic (human) activities, particularly fossil fuel burning and deforestation, are also releasing carbon dioxide into the atmosphere. When we mine coal and extract oil from the Earth’s crust, and then burn these fossil fuels for transportation, heating, cooking, electricity, and manufacturing, we are effectively moving carbon more rapidly into the atmosphere than is being removed naturally through the sedimentation of carbon, ultimately causing atmospheric carbon dioxide concentrations to increase. Also, by clearing forests to support agriculture, we are transferring carbon from living biomass into the atmosphere (dry wood is about 50 percent carbon). The result is that humans are adding ever-increasing amounts of extra carbon dioxide into the atmosphere. Because of this, atmospheric carbon dioxide concentrations are higher today than they have been over the last half-million years or longer.


Not all of the carbon dioxide that has been emitted by human activities remains in the atmosphere. The oceans have absorbed some of it because as the carbon dioxide in the atmosphere increases it drives diffusion of carbon dioxide into the oceans. However, when we try to account for sources and sinks for carbon dioxide in the atmosphere we uncover some mysteries

2007-02-24 22:33:33 · answer #1 · answered by ♥!BabyDoLL!♥ 5 · 0 0

I think in these recent years, humans especially in the developed countries beginning to be conscious about their health. Hence more people are exercising and doing workouts such as going to the gym, running, cycling etc.

So, when people exercise more, their metabolism is higher and on top of that respiration also went higher resulting in an increase of CO2 emission from their lung.

If humans all relaxed and keep their metabolism low, therefore they exhale less, the world will face less Co2 emission. Remember, apart from industries, forest fires, we, humans billions of us also exhale carbon dioxide!!!

2007-02-24 23:02:26 · answer #2 · answered by Anonymous · 0 0

as a rule events that launch greenhouse gasses. CO2, methane (from cow poop), water vapor (sure that fool who stated water vapor has been there invariably.... there'll me lots extra whilst a tiny little bit of warming happens, extra advantageous inflicting warming) additionally events like deforestation, which shrink the quantity of CO2 soaking up trees. i will not be able to have confidence what number anybody is dumb sufficient to not think of what number circumstances extra CO2 a automobile would launch than a organic human (lots extra advantageous than 100X the common human would launch). they save questioning that's pretend. they only hear the stuff against international warming because of the fact it advantages them not certainly questioning ninety 9% of the medical and political community consents that's actual. What the heck do you think of they're going to benefit by skill of asserting there is international warming????? tell me that for individuals's so called "hidden political time table"

2016-10-16 10:59:11 · answer #3 · answered by ? 4 · 0 0

So, you did not pay attention in class, did you?

2007-02-24 22:33:21 · answer #4 · answered by Anonymous · 0 1

...farting !

2007-02-24 22:38:58 · answer #5 · answered by Anonymous · 0 1

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