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Vocapedia
> Earth >
Climate change, Global warming
> Greenhouse gases > Methane
What are the main
man-made greenhouse gases?
2011
The greenhouse gases
that humans do emit directly
in significant quantities are:
• Carbon dioxide (CO2).
Accounts for around three-quarters
of the warming impact of current
human greenhouse-gas emissions.
The key source of CO2
is the burning of fossil fuels
such as coal, oil and gas,
though deforestation
is also a very significant contributor.
• Methane (CH4).
Accounts for around 14%
of the impact of current human
greenhouse-gas emissions.
Key sources include
agriculture
(especially livestock
and rice fields),
fossil fuel extraction
and the decay
of organic waste
in landfill sites.
Methane doesn't persist
in the atmosphere
as long as CO2,
though its warming effect
is much more potent
for each gram of gas released.
• Nitrous oxide (N2O).
Accounts for around 8%
of the warming impact
of current human
greenhouse-gas emissions.
Key sources include
agriculture
(especially nitrogen-fertilised soils
and livestock waste)
and industrial
processes.
Nitrous oxide
is even more potent
per gram than methane.
Fluorinated gases ("F gases").
Account for around 1%
of the warming impact
of current human
greenhouse-gas emissions.
Key sources
are industrial processes.
F-gases
are even more potent per gram
than nitrous oxide.
http://www.guardian.co.uk/environment/2011/feb/04/
man-made-greenhouse-gases
(...) methane,
the main
component of natural gas UK / USA
Methane
is a far more powerful
greenhouse gas
than carbon dioxide,
though it doesn’t last
nearly as long
in the atmosphere.
Still,
over a 20-year period,
one pound of it
traps as much heat
as at least 72 pounds
of carbon dioxide.
Its potency declines,
but even
after a century,
it is at least 25 times
as powerful
as carbon dioxide.
When burned,
natural gas
emits half
the carbon
dioxide
of coal,
but methane leakage
eviscerates
this advantage
because of
its heat-trapping power.
http://www.nytimes.com/2013/07/29/opinion/gangplank-to-a-warm-future.html
https://www.nytimes.com/2019/12/16/
climate/methane-leak-satellite.html
https://www.theguardian.com/world/2019/dec/01/
new-zealand-begins-genetic-program-to-produce-low-methane-emitting-sheep
https://www.npr.org/sections/thesalt/2019/11/30/
783001327/chew-on-this-farmers-are-using-food-waste-to-make-electricity
https://www.theguardian.com/environment/2019/nov/15/
methane-emissions-from-coal-mines-could-stoke-climate-crisis-study
https://www.theguardian.com/environment/2019/aug/14/
fracking-causing-rise-in-methane-emissions-study-finds
https://www.theguardian.com/environment/2019/feb/17/
methane-levels-sharp-rise-threaten-paris-climate-agreement
https://www.npr.org/sections/thesalt/2018/10/29/
661064123/worlds-biggest-pork-producer-pledges-to-cover-manure-ponds
https://www.npr.org/sections/thesalt/2018/07/03/
623645396/surf-and-turf-to-reduce-gas-emissions-from-cows-scientists-look-to-the-ocean
https://www.npr.org/2018/06/23/
622727843/large-methane-leaks-threaten-perception-of-clean-natural-gas
https://www.npr.org/sections/thetwo-way/2018/04/11/
601557548/environmental-group-plans-methane-tracking-satellite
http://www.npr.org/sections/thesalt/2017/09/22/
552698446/gassy-cows-warm-the-planet-scientists-think-they-know-how-to-squelch-those-belch
http://www.npr.org/sections/thetwo-way/2017/05/10/
527786637/senators-reject-effort-to-roll-back-greenhouse-gas-emissions-rule
http://www.npr.org/2017/05/03/
526729339/inside-the-debate-over-repealing-curbs-on-methane-leaks
http://www.npr.org/2017/01/02/
507100296/methanes-on-the-rise-but-regulations-to-stop-gas-leaks-still-debated
https://www.theguardian.com/environment/2016/oct/26/
what-is-causing-the-rapid-rise-in-methane-emissions
http://www.nytimes.com/2014/10/07/
opinion/joe-nocera-moment-of-truth-on-emissions.html
http://www.nytimes.com/2013/07/29/
opinion/gangplank-to-a-warm-future.html
http://www.whitehouse.gov/sites/default/files/
strategy_to_reduce_methane_emissions_2014-03-28_final.pdf
methane emissions
from cows USA
https://www.npr.org/sections/thesalt/2018/07/03/
623645396/surf-and-turf-to-reduce-gas-emissions-from-cows-scientists-look-to-the-ocean
methane emissions
from coalmines UK
https://www.theguardian.com/environment/2019/nov/15/
methane-emissions-from-coal-mines-could-stoke-climate-crisis-study
cut Methane emissions
USA
http://www.nytimes.com/2014/03/29/us/
politics/white-house-unveils-plans-to-to-cut-methane-emissions.html
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