Sentences with phrase «emitted by human activity»

Greenhouse gases emitted by human activity don't just affect the atmosphere; they also have a negative impact on the world's oceans.

Although natural variations in the solar output can explain most of the temperature variations over the past centuries, it appears that global warming by heat - trapping gases, emitted by human activity, is required to explain the sharp rise in global temperatures during the 1990s.

It is simply ludicrous to pretend that the amounts of CO2 emitted by human activity are insignificant: the rise in atmospheric CO2 has been copiously documented, and is known to be caused by human activity: fossil fuel use, deforestation and land use change.

For instance, Bond et al. report that black carbon aerosol, or soot, is second only to carbon dioxide as the substance emitted by human activity that has the greatest warming influence on the climate — contributing a quarter (or perhaps even a bit more) to the current overall anthropogenic warming effect.

Ozone - depleting substances are emitted by human activity at the planet's surface and eventually travel to the stratosphere, where there the chlorine atoms and certain other constituent parts break apart the three oxygen atoms that make up an ozone molecule.

CO2 is the most important greenhouse gas emitted by human activity»

But the sector is also responsible for the emissions that come from the use of their products — in total, around 44 percent emitted by human activity in the United States.

I can readily accept that CO2 absorbs and re-radiates IR under laboratory conditions, that it is emitted by human activity and that its concentration in the atmosphere has increased since measurements started at Mauna Loa.

About a quarter of the carbon dioxide emitted by human activity is taken up by the world's oceans.

Permanently frozen soils worldwide contain 1400 - 1700 Gigatons of carbon, about four times more than all the carbon emitted by human activity in modern times.

According to the latest report from the Global Carbon Project, a group of scientists who track the amount of carbon emitted by human activity, 2017 will see a 2 percent increase in the burning of fossil fuels, after nearly no growth in 2014, 2015 or 2016.

Our homes and offices account for more than one third of all greenhouse gases emitted by human activity — the bulk of it for heating in winter and air - conditioning in summer, according to the U.N. Intergovernmental Panel on Climate Change (IPCC).

After all, coal burning is responsible for 40 percent of the 30 billion metric tons of CO2 emitted by human activity every year.

But the Southern Ocean plays a more benign role in the global carbon budget: Its waters now take up about 50 % of the atmospheric carbon dioxide emitted by human activities, thanks in large part to the so - called «biological pump.»

Sulfate is emitted by human activities in addition to natural emissions such as volcanoes.

When carbon is emitted by human activities into the atmosphere it is generally thought that about half remains in the atmosphere and the remainder is stored in the oceans and on land.

Over a long enough period of time, the increased carbon burial could help offset a small fraction of carbon emitted by human activities such as fossil fuel burning, says study coauthor Antje

«Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research concludes that the greenhouse gases emitted by human activities are the primary driver,» the letter states.

Some almost imperceptible measure of that is carbon emitted by human activities.

She asked him to explain his dissent in the 2007 case in which the Supreme Court ruled that the Environmental Protection Agency had the authority to regulate carbon dioxide, the main greenhouse gas emitted by human activities, as a pollutant under the Clean Air Act.

The scientists find much merit in pursuing further research on both, but only see practical prospects for capturing and storing carbon dioxide, the main greenhouse gas emitted by human activities.

The latest report confirms that there is unequivocal evidence for a warming world, largely caused by greenhouse gases emitted by human activities.

Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research concludes that the greenhouse gases emitted by human activities are the primary driver.

Rigorous scientific research concludes that the CO2 emitted by human activities is the primary driver of a profoundly beneficial greening of our planet from its boost to life giving photosynthesis.

The value at the end of Barack Obama's presidency was set at roughly $ 40 for each ton of carbon dioxide, the main greenhouse gas emitted by human activities, or equivalent amounts of other gases such as methane.

In addition, the CO2 emitted by human activities has caused an increase of ocean acidity, with poorly understood but potentially important negative impacts.

The rise in greenhouse gases corresponds with the extra amount of CO2 known to have been emitted by human activities, such as burning fossil fuels and cutting down forests.

The letter states: «Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research demonstrates that the greenhouse gases emitted by human activities are the primary driver.

The concentration of carbon dioxide in the atmosphere correlates closely — but not perfectly — with the amount of carbon pollution emitted by human activities.

James Hansen, director of NASA's Goddard Institute for Space Studies in New York, today published a study showing that greenhouse gases emitted by human activities have brought the Earth's climate close to critical tipping points, with potentially dangerous consequences for the planet.

Carbon dioxide is emitted by human activities as well as a host of natural processes.

Not exact matches

The only real climate change solutions that I have seen are to reduce carbon dioxide in the air by having human activity emit less of it.

Krotkov and his team now are able to more accurately detect smaller sulfur dioxide concentrations, including those emitted by human - made sources such as oil - related activities and medium - size power plants.

The amount of nitrous oxide in the atmosphere has quickly increased as well, with about a third of the total added by human activity — much of that emitted by nitrogen - based fertilizers, and half of that from just three nations: China, the Soviet Union, and the United States.

Even allowing for the relative strength of the effects, CO2 is still responsible for two - thirds of the additional warming caused by all the greenhouse gases emitted as a result of human activity.

After years of discussions, proposals and various agreements, two locations were selected, far away from any human activity and any interference emitted by TVs, radios, mobile phones and the like.

Lately, he's focused closely on carbon dioxide, developing a variety of ways to visualize the roughly 80 million tons of the greenhouse gas emitted daily by human activities.

CAGW or Catastrophic Anthropogenic Global Warming is the acronym used (mostly by those that don't support taking immediate action on climate change) for the theory (or collection of hypotheses) that attribute most of the observed modern warming to human activities and warn that continuing similar activities (mostly emitting CO2) could result in warming that is dangerous to both civilization and a number of ecosystems.

Some of ag's CO2 is emitted directly by feedlots, farm equipment, and related transportation activities; some (such as unwanted leaves, stems and the like) is recycled into the soil but still remains in the active carbon cycle; some (probably a small fraction) is transpired or excreted by humans and our commensals.

While most of the CO2 emitted by far is the result of natural phenomena — namely respiration and decomposition, most attention has centered on the three to four percent related to human activities — burning of fossil fuels, deforestation.

This is the drop in seawater pH as the oceans absorb an estimated 22 million tons of carbon dioxide from the 80 million tons emitted each day by human activities.

About 40 percent of methane is emitted into the atmosphere by natural sources like wetlands and termites, with the rest coming from human activities like cattle breeding, rice growing, fossil fuel exploitation, landfills and biomass burning.

The research challenges the long - held belief that forests act as «carbon sinks» by storing more carbon than they emit due to natural processes and human activity.

Some skeptics have attributed contemporary climate change to natural fluctuations in solar activity, rather than human - emitted greenhouse gases — the explanation endorsed by nearly all climate scientists, including those convened by the Intergovernmental Panel on Climate Change.

The EPA, not the Congress, is the agency of the US Government designated by the Clean Air Act to make an official determination as to whether or not a substance being emitted into the atmosphere from human activities represents a danger to public health and the environment.

I have been keeping notes on significant cold weather anomalies since appox 2014 and I will paste them below, obviously the low solar activity is the principle cause of these anomalies but does human activity such as pollution - aerosals that humans emit make the conditions worse — that can not be proven but it's obvious that most of the climate change, whether it's cooling or warming is natural not»cause d' by human activity.

The reason for the accumulation is simple: Human activities are emitting more carbon dioxide than the planet's natural processes (uptake by plants and the ocean) can remove.

A substantial fraction of the carbon dioxide (CO2) emitted into the atmosphere by human activity remains there, in effect, for centuries to millennia.

Human activities emit 60 or more times the amount of carbon dioxide released by volcanoes each year.

In their statement, the scientific academies say the oceans have absorbed about a quarter of the carbon dioxide emitted to the atmosphere by human activities since the industrial revolution, resulting in rapid and irreversible changes in ocean chemistry.