What causes greenhouse gases?

Answer 1

There are many causes for greenhouse gas emissions, but most are carbon neutral, that is, they release carbon dioxide which was recently removed from the atmosphere, and so make no contribution to global warming. The main ones are:

1. The oceans. Primary source of carbon dioxide, but they consume as much as, or more than, they produce, so, in net terms, no emissions.
2. Dead trees and plants. When plants die, they rot, releasing their stored carbon to form carbon dioxide. But, combined with LIVING trees and plants, no net emissions.
3. Insects, through respiration.
4. Domesticated animals, through respiration (mainly talking about carbon dioxide here, but animals also release methane).
5. Wild animals (not including insects), through respiration.
6. Humans, through respiration
7. Industrial, non-fossil-fuel carbon dioxide emissions.

The causes of emissions that cause global warming are:

1. Burning of fossil fuels (coal, oil and natural gas) in internal combustion engines (all kinds of transport)
2. Burning of fossil fuels to generate electricity.
3. Burning of fossil fuels in industry.
4. Burning of fossil fuels domestically, for heating and cooking.
5. Methane from ruminant animals and also from poor farming practices.
6. Volcanoes.

Answer 2

The major Greenhouse gases are:

Water Vapor (roughly 80% of the atmosphere)

CO2 (0.038% of the atmosphere)

CH3 (0.001% of the atmosphere)

Nature produces about 99.72% of all greenhouse gases. Man produces about 0.28% of these gases. The one that man produces the most of in terms of contributory volumes is CO2.

Man produces roughly 6% of the CO2 produced annually. The remaining CO2 created by man is from coal (over 50% of man's contribution to CO2) and then by gas and oil (about 36%)

CH3 is also called methane and comes from animals biological function. Roughly 30% of these animals are used for human purposes the remaining 70% are wild or not captive animals.

While water vapor makes up the vast bulk of our Green house gas and the associated forcing (warming action). it is not the best gas at warming. CO2 is 30 times better (per particle) at this.

Water vapor varies greatly depending on the weather and temperature. CO2 is rising with 2014 levels at 400 ppm (parts per million) or 0.04%.

Methane (CH3) is a much smaller volume yet it has even greater impact then CO2. It's contribution is about 25 times more then CO2 per particle. This means that CH3 contributes up to 1% of the realistic total forcing we see.

Answer 3

The most common green house gas is water. Virtually all water vapor is caused through natural issues.

Second, in terms of total volume is Carbon Dioxide. Nature produces roughly 93% of this gas through the decaying process and animal respiration.

Trace amounts of other gases are mainly natural in cause also, although man produces about 0.28% of all greenhouse gas made annually and when you take water out of the equation it rises to about 5%. Nature and natural processes produce the rest.

Answer:

Human causes of greenhouse gases, of course, include combustion of fossil fuels, which releases carbon dioxide, agricultural practices, especially cattle and pig rearing which contribute methane.

Methane is also released from tundra and frozen lakes as they thaw.

Answer 4

Mostly the burning of fossil fuels (coal, oil and natural gas) in industry, transport and the generation of electricity, which releases carbon dioxide (CO2).