Not exact matches
Following the discovery of volcanic rocks of the same age
as the extinction, volcanic carbon
dioxide (CO2) emissions had previously been suggested
as an important
contributor to this extinction event.
The largest
contributor to global warming is carbon
dioxide and
as it remains in the atmosphere for a long time, it works cumulatively.
But HFCs remain a small
contributor to meeting the grand challenge of stabilizing climate, with many centuries of heating of the climate and oceans being driven predominantly by the unrelenting buildup of long - lasting carbon
dioxide,
as Raymond Pierrehumbert of Oxford University and others have shown.
If the goal of climate policy is to stabilize concentrations of carbon
dioxide, then air capture technologies should be enthusiastically welcomed
as a possible
contributor to achieving that goal.
Deforestation is a frequently overlooked source of carbon
dioxide emissions and a significant
contributor to climate change,
as trees, which store carbon, instead release it when they are burned during slash - and - burn land clearing of forests.
Planting rice [image credit: BBC]
As the report concludes: «Both global warming and carbon
dioxide have benefitted plant growth, and both are important
contributors to the success of modern civilization.»
Indeed, strong observational evidence and results from modeling studies indicate that, at least over the last 50 years, human activities are a major
contributor to climate change.Direct human impact is through changes in the concentration of certain trace gases such
as carbon
dioxide, chlorofluorocarbons, methane, nitrous oxide, ozone, and water vapor, known collectively
as greenhouse gases.
While natural factors certainly affect the climate, human factors are the main
contributor to global warming, and carbon
dioxide has acted
as the «primary control knob» governing the earth's relatively recent uptick in temperature.
Scientists have identified carbon
dioxide gases
as the leading
contributor to global warming, a phenomenon that threatens to progressively increase the temperature of the planet.
Recent research finds that methane release from thawing permafrost may outpace carbon
dioxide as a major
contributor to global warming over the next century.
He described Pruitt's claim that carbon
dioxide is not a primary
contributor to climate change
as «shocking,» likening it to the tobacco industry's refusal to acknowledge the link between smoking and lung cancer.
According to the EPA, methane is a particularly big
contributor to climate change,
as it has 28 to 36 more global warming potential than carbon
dioxide emissions.
Unfortunately, coal combustion is a major
contributor to global greenhouse gas emissions
as well, accounting for 30 % of total anthropogenic carbon
dioxide (CO2) emissions worldwide, and 72 % of CO2 emissions from global power generation.