What human activity has increased carbon dioxide in the atmosphere over the years?

Answer 1

Greenhouse gases (GHG) are those gases which absorb solar radiation and re-radiate the heat into the atmosphere. The principal gases in this category are carbon dioxide and methane.

Human activities which lead to these emissions or decreased activity of GHG sinks are:

• Burning of fossil fuels
• Agricultural practices (cattle related methane emissions and loss of carbon sequestration in soil by modern tilling practices)
• Reduction of forest cover
• Methane leaks from oil and gas fields

Just keep doing what we are already doing will do that (e.g. burning lots of fossil fuels, heavy logging).

Answer 2

Burning fossil fuels (coal, oil and natural gas). This releases carbon that was stored underground 300 million years ago, during the Permian Period.

Releasing it now, as we do, adds carbon dioxide that is extra, and more then the natural carbon cycle can manage to remove from the atmosphere.

The other human activity which has increased carbon dioxide in the atmosphere is deforestation. By cutting down forests we remove the trees that can absorb vast quantities of carbon. Half the weight of a tree is carbon.

Answer 3

Humans burn fossil fuels (primarily coal and oil). This activity currently liberates over 30 billion tons of CO2 into the atmosphere each year.

We dig up 7 billion tons of coal per year, and pump 4 billion tons of oil. Not all the oil is burned. Some of it goes into lubricants, plastics, and other materials. But most of the coal is burned for fuel.

If you combine those you get 11 billion tons of carbon. The atomic weight of carbon is 12. The atomic weight of oxygen is 16. So every pound of coal oxidized yields 3.7 pounds of CO2. 11 billion tons times 3.7 is 40 billion tons of CO2 added to the atmosphere each year. This gas accumulates, it does not readily come back out again. So atmospheric carbon dioxide levels continue to rise. The level has risen from 290 parts per million in 1900 to 400 ppm today. We will exceed 500 ppm before 2050, at our current rate of consumption.

CO2 traps infrared radiation, which is why it is a greenhouse gas. The net effect is that earth's temperature continues to rise.

A:Coal fired power plants liberate more carbon from long sequestered sources than any other human activity. The consumption of fossil fuels by the transportation industry is a close second. A:There are many things that increase carbon dioxide in the air, including:

- Cars

- Burning fossils fuels

- Keeping electricity open when unnecessary

- Factories

- Cutting down trees

There are many others.

A:

1. Cutting down trees (deforestation)
2. Burning fossil fuels (coal, oil and natural gas) for transport, heating and for generating electricity.

Answer 4

The human activities of deforestation and the burning of fossil fuels have caused the amount of carbon dioxide to increase in the atmosphere. Cutting down trees means that fewer are available to remove carbon dioxide (photosynthesis). Burning fossil fuels (coal, oil and natural gas) releases extra carbon dioxide that has been hidden away for millions of years.

Answer 5

Deforestation (both from burning trees themselves, which convert CO2 to O2, and from the chemicals released in burning), driving cars, factories.

Answer 6

Mainly, the burning of fossil fuels (coal, oil, and natural gas) has caused a rise in the atmospheric level of carbon dioxide.

Answer 7

Deforestation.

and I'm sure