The ocean (physical 'pumping' by simple dissolution and photosynthesis) and the terrestrial biosphere (photosynthesis) are sinks for atmospheric C02 Patient , each absorbing 2 GtC per year more than they Source release. [ JACLET 0 SB TK MCLH 18/10/2012 ]

On a global scale, The volcanoes Source release less than 1 % of human emissions of carbon dioxide Patient and hence are a minor contributor to changes in its atmospheric concentrations. [ 6CANADAQFP 0 SB TK 18/10/2012 ]

Scientific studies show that a variety of human activities Cause release greenhouse gases Patient . [ 3CANADAENVIRON 0 SB TK 18/10/2012 ]

The burning of gasoline in a car engine Cause releases greenhouse gases such as carbon dioxide and nitrous oxide Patient , but also emits volatile gases such as nitrogen oxides that contribute to urban smog issues. [ 5CANADAICC 0 SB TK MCLH 18/10/2012 ]

Industrial emissions Cause account for 43 % of carbon Patient released in 1995 Duration . [ 8IPCCATTENUATION 0 SB TK MCLH 18/10/2012 ]

Conversely, if more carbon Patient is removed from the atmosphere than released into it Destination , its concentration in the atmosphere decreases. [ 5CANADAICC 0 SB TK 18/10/2012 ]

That is, on average, the amount Patient released into the atmosphere Destination each year Frequency has been approximately equal to the amount removed again. [ 5CANADAICC 0 SB TK 12/10/2012 ]

Because these and many other halocarbons are very stable and do not readily react chemically with other gases, each molecule Patient released into the atmosphere Destination can remain there for decades and even many centuries, until it is finally broken down in the upper atmosphere by intense ultraviolet radiation or escapes into space. [ 5CANADAICC 0 SB TK 18/10/2012 ]

Each year, The humans Agent release more than 22 billion tonnes of carbon dioxide Patient into the atmosphere Destination through the burningof fossil fuels for energy Cause . [ 6CANADAQFP 0 SB TK 18/10/2012 ]

Humans Agent also release a lot of carbon dioxide Patient into the atmosphere Destination by breathing Cause . [ 6CANADAQFP 0 SB TK 18/10/2012 ]

Buildings and vehicles Agent release heat Patient directly Manner to the atmosphere Destination , while air pollution and the dark surfaces of pavements and roof tops add to the absorption of sunlight. [ 5CANADAICC 0 SB TK MCLH 18/10/2012 ]

Every year, motor vehicles exhaust Agent release more than 134 million tones of GHGs Patient into the atmosphere Destination . [ 5CANADAICC 0 SB TK 18/10/2012 ]

For one, it will take time to put in place measures reducing our greenhouse gas emissions, and secondly, greenhouse gases are long-lived, so the emissions Patient we Agent release now will affect the climate system for decades to come. [ 2EUROPACHANGE 0 SB TK 18/10/2012 ]

Not surprisingly, the release of carbon dioxide from fossil fuel burning is very unevenly distributed around the world, with the largest share Patient being released by developed countries Agent in the Northern Hemisphere Location . [ 5CANADAICC 0 SB TK 18/10/2012 ]

Most of this energy comes from the burning of fossil fuels, such as oil, coal and gas , which Cause release carbon dioxide , the main greenhouse gas Patient , into the atmosphere Destination . [ ENCY 0 SB TK 18/10/2012 ]

In the first case, injection well failures or leakage up abandoned wells could create a sudden and rapid Manner release of CO2 Patient . [ 5IPCCDYOXYDE 0 SB TK MCLH 18/10/2012 ]

A sudden Manner and large Expanse release of CO2 Patient would pose immediate dangers to human life and health, if there were exposure to concentrations of CO2 greater than 7 - 10 % by volume in air. [ 5IPCCDYOXYDE 0 SB TK MCLH 18/10/2012 ]

The release of chlorofluorocarbons Patient , for example, both contributes to the destruction of the ozone layer in the stratosphere and enhances the greenhouse effect. [ 5CANADAICC 0 SB TK 18/10/2012 ]

However, best estimates suggest that the net accumulated climatic effect over the next century of the release of a gram of nitrous oxide Patient is almost 300 times that of a gram of carbon dioxide. [ 5CANADAICC 0 SB TK 18/10/2012 ]

CFC banks in foams are projected to decrease much more slowly over the same period (from 10 to 7 GtCO2-eq), reflecting the much slower Manner release of banked blowing agents from foams Patient when compared with similarly sized banks of refrigerant in the refrigeration and air-conditioning sector. [ 4IPCCSROCSPMTS 0 SB TK MCLH 18/10/2012 ]

Changes in biodiversity at ecosystem and landscape scale, in response to climate change and other pressures (e.g., changes in forest fires and deforestation), would further affect global and regional climate through changes in the uptake and release of greenhouse gases Patient and changes in albedo and evapotranspiration. [ 2IPCCBIODIVERSITE 0 SB TK MCLH 18/10/2012 ]

Not surprisingly, the release of carbon dioxide Patient from fossil fuel burning Cause is very unevenly distributed around the world, with the largest share being released by developed countries in the Northern Hemisphere. [ 5CANADAICC 0 SB TK MCLH 18/10/2012 ]

Just as for trees, the carbon dioxide that humans exhale is part of an active natural carbon cycle involving intake of carbon from food we eat and the release of carbon Patient through breathing and human wastes Cause . [ 6CANADAQFP 0 SB TK MCLH 18/10/2012 ]

On land, the uptake of anthropogenic CO2 very likely exceeded the release of CO2 Patient by deforestation Cause during the 1990s Time . [ GREENFACTS 0 SB TK MCLH 18/10/2012 ]

Will the natural system continue to absorb more than 50% of human Agent release of carbon dioxide Patient into the terrestrial biosphere and into the oceans Destination ? [ 5CANADAICC 0 SB TK MCLH 18/10/2012 ]

Deeper seasonal thawing Cause will improve the drainage conditions and stimulate the release of soil nutrients Patient to biota Destination . [ 2IPCCBIODIVERSITE 0 SB TK 18/10/2012 ]

On a global scale, however, the effects have been much more subtle, because the damage is being caused by the unnatural Manner release into the atmosphereof gases Destination that are mostly odourless and invisible - seemingly innocent substances, whose effects are not immediately apparent. [ 5CANADAICC 0 SB TK MCLH 18/04/2014 ]