Sentences with phrase «released by human activities»

Science News - January 23, 2002 Antarctica is getting colder... For years, many climatologists have been predicting that world temperatures will rise because of atmospheric buildup of greenhouse gases released by human activities.

But carbon dioxide and other greenhouse gases aren't the only air pollution released by human activities.

Back in December, the EPA announced that it had determined that greenhouse gases released by human activities «threaten the public health and welfare of current and future generations.»

Rice paddies produce an estimated 20 % of the methane released by human activities.

Overall, the new research finds a total of 33 million tons (30.1 teragrams) of methane was released by human activities in the United States in 2004.

Also, the ocean contributes in generating food and oxygen for human being and fighting against climate change by absorbing 93 percent of the carbon dioxide released by human activities.

Although it is released by human activities through the combustion of fossil fuels, it is also formed by certain natural processes (see carbon cycle).

Britain's Royal Society has published a helpful new collection of papers in Philosophical Transactions of the Royal Society B that provide fresh insights on how the global buildup of carbon dioxide released by human activities could affect ocean ecology.

Students compare the carbon sequestration potential for land - use types in their state, compare this to the amount of carbon released by human activities, and then discuss forests» ability to sequester atmospheric carbon.

The rest is released by human activities, with coal - fired power plants contributing the largest source of mercury to the atmosphere.

In previous years, the Antarctic ozone hole, which is caused by destructive chemical reactions involving CFCs released by human activities, had formed at higher altitudes — above 15 kilometres.

For a long time it was assumed that these compounds are only produced and released by human activity.

(The ocean currently absorbs roughly half of the greenhouse gases, primarily carbon dioxide, that are released by human activity.)

This effect is caused by increased levels of carbon dioxide, chlorofluorocarbons and other gases in the air, many of them released by human activity.

So, by increasing photosynthesis on earth by one - third, as much additional energy will be absorbed by plants as is released by all human activity.

Photo The savage heat waves that struck Australia last year were almost certainly a direct consequence of greenhouse gases released by human activity, researchers said Monday.

Supporters, meanwhile, claim that carbon dioxide released by human activity must be curtailed to «save the climate.»

Washington, DC — A team of scientists led by Carnegie's Rebecca Albright and Ken Caldeira performed the first - ever experiment that manipulated seawater chemistry in a natural coral reef community in order to determine the effect that excess carbon dioxide released by human activity is having on coral reefs.

Results in the CMIP5 archive reflect the current state of understanding about the way the physics of the atmosphere and oceans respond to changes in concentrations of greenhouse gases released by human activity.

Not exact matches

``... a number of scientific studies indicate that most global warming... is due to the great concentration of greenhouse gases released mainly as a result of human activity... these gases do not allow the warmth of the sun's rays reflected by the earth to be dispersed in space.

Baby Milk Action press release 10 June 2014 Baby Milk Action is today joining colleagues around the world calling on governments to support international efforts to strengthen international law, thereby better protecting people from human rights abuses caused by corporate activities.

That amount — roughly 10 % of the total released annually by human activity — could rise if global warming heats the sea and spawns storms with faster winds, he notes.

The AAAS Board of Directors released a statement 18 February 2007 noting that «global climate change caused by human activities is occurring now, and it is a growing threat to society.»

At present, the ocean takes up a quarter of the CO2 - released to the atmosphere by human industrial activities — with long - lasting consequences for the chemical composition of seawater and marine habitats.

«I agree that carbon dioxide is a greenhouse gas, that greenhouse gas concentrations in the atmosphere are increasing as a result of human activities — primarily burning coal, oil, and natural gas — and that this means the global mean temperature is likely to rise,» Ebell said in the statement released by CEI yesterday.

That molecule — released by the gigaton from human activities like fossil fuel burning and clearing forests — causes the bulk of global warming.

Even though large amounts are released into the air by human activities such as coal burning, smelting, mining and waste incineration, mercury also occurs naturally in the environment, where it undergoes a complex chemical cycle.

Emissions of CO2 by human activities, including fossil fuel burning, cement production, and gas flaring, amount to about 27 billion tonnes per year (30 billion tons)-LSB-(Marland, et al., 2006)-- The reference gives the amount of released carbon (C), rather than CO2, through 2003.].

As a gigantic carbon sink, the ocean has taken up about a third of the carbon dioxide released into the atmosphere by human activities.

The new data — from animals and human cells — show that the vapors released by e-cigarettes can alter the activity of genes.

As a gigantic carbon sink, the ocean has taken up about a third of the carbon dioxide (CO2) released into the atmosphere by human activities.

The reality is that while we humans certainly do release carbon and other gases by our activities, this amount to a tiny fraction of the total of these gases (between1 % and 3 % depending upon what source you care to believe) which exist in nature regardless of our actions.

«Due to human activities such as the combustion of fossil fuels and deforestation, and the increased release of CO2 from the oceans due to the increase in the Earth's temperature, the concentration of atmospheric carbon dioxide has increased by about 35 % since the beginning of the age of industrialization.»

Karl Braganza, [6] manager of the BoM's climate monitoring section, said the warming trend fueled by the release of greenhouse gases from human activity, was «very clear.»

Climate change is driven by human activity — chiefly the combustion of fossil fuels and changes in land use — and forests and other natural ecosystems play a powerful role in both soaking up the greenhouse gases released by human economic activity and at the same time sheltering many of the other 10 million or so species that share the planet.

«In considering the question of human activity and climate change it is essential to distinguish between global warming, which is a progressive increase in the annual mean global temperature, and human - activity - induced greenhouse warming, as may, for example, be caused by the release of greenhouse gases into the atmosphere as a result of fossil fuel combustion or deforestation.»

unless ameliorated by ceding to government the power to control all human activity that affects the release of CO2 into the atmosphere.»

These chemicals are released by a wide variety of human activity in the industrial world, from driving cars to treating sewage.

The study also confirmed that the improvement of the ozone was largely because of the ban on CFCs by most countries in the Montreal Protocol, meaning that the degradation, too, was largely caused by the initial human activity of releasing the CFCs.

Figure 2.4: Different amounts of heat - trapping gases released into the atmosphere by human activities produce different projected increases in Earth's temperature.

That warning comes weeks after the United Nations released its latest report concluding with «very high confidence» that growing extremes in weather are being influenced by human activity, thus creating new risks for energy systems.

As reported in the Los Angeles Times in late April 2015, the US Geological Survey (USGS) released a map of earthquakes «thought to be triggered by human activity in the eastern and central United States» — coinciding with the emerging view of officials «that wastewater disposal following oil and gas extraction is causing more earthquakes.»

The Fraser Institute booklet, Understanding Climate Change, released March 6, evades debate as to whether the world is warming or to what extent warming is caused by human activity.

A large majority of people in New York believe that global warming is happening because of human activities, and more than two - thirds think that parts of the city will even have to be abandoned over the next 50 years because of rising sea levels, according to survey results released this morning by Columbia and Yale Universities, which called the research the first comprehensive study of opinions from residents of the five boroughs about global warming.

There are indications that large regions of the permafrost in parts of Alaska and other northern polar areas are already thawing, with the potential to release massive amounts of carbon into the atmosphere beyond those being directly added by human activity.

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

A recent paper by Dr. Tami Bond and colleagues finds that carbon aerosols — particulates released into that atmosphere from a variety of human activities including diesel engines, open cook stoves, poorly filtered coal burning, and open burning, etc. — have played a much larger role in impacting the climate than has been previously recognized (and included in climate models).

¶ ¶ 38 («when used -LSB-,]... fossil fuels release greenhouse gases), 39 («use of fossil fuels emits carbon dioxide»), 45 («emissions resulting from human activities are substantially increasing... greenhouse gases»), 48 («increase in atmospheric carbon dioxide caused by the combustion of fossil fuels»), 52 («fossil fuels -LSB-,]... when combusted, emit carbon dioxide»).

This increase is due to a few centuries of human activities that have released carbon stored by plants — initially in the form of trees (deforestation), and more recently also in the form of fossil plants (fossil fuels).

The world's oceans act as a huge sponge for the carbon dioxide released into the atmosphere by human activities, but all of that extra CO2 increases the acidity in the waters, which can be harmful to the organisms that call the sea home.