Sentences with phrase «human carbon release»

Not exact matches

... A number of scientific studies indicate that most global warming in recent decades is due to the great concentration of greenhouse gases (carbon dioxide, methane, nitrogen oxides and others) released mainly as a result of human activity... Doomsday predictions can no longer be met with irony or disdain.

«The results show unequivocally that most of the increase in CO2 between 7000 and 500 years ago is due to release of carbon from the ocean, not to axe - wielding humans,» says Eric Steig, an isotope geochemist at the University of Washington in Seattle.

The Amazon basin stores an estimated 120 billion tons of Earth's carbon — that's about 3 times more carbon than humans release into the atmosphere each year.

«By extracting wood from unmanaged forest and bringing these forests under production, humans released carbon into the atmosphere that would otherwise be stored in the biomass, litter, dead wood, and soil of the forest,» Naudts said.

While scientists and policy experts debate the impacts of global warming, Earth's soil is releasing roughly nine times more carbon dioxide to the atmosphere than all human activities combined.

«If the natural concentration had been a factor of two or more lower, the climate impacts of fossil fuel carbon dioxide release would have occurred about 50 or more years sooner, making it much more challenging for the developing human society to scientifically understand the phenomenon of humanmade climate change in time to prevent it,» he says.

Their findings suggest humans are releasing carbon about 10 times faster than during any event in the past 66 million years.

The rate of carbon release during the PETM was determined to be much smaller than the current input of carbon to the atmosphere from human activities.

But much of it takes place in oceans, which are susceptible to the increasing amounts of carbon dioxide human activity releases into the atmosphere.

5) Cremating a human body releases 15 kilograms of carbon dioxide (along with other pollutants, such as mercury from dental fillings), while traditional burial uses up scarce land.

«The Lancet report underscores the terrible consequences for human health if we don't start reducing the dangerous carbon pollution fueling climate change — and dramatic benefits for people the world over from taking action now,» echoed Kim Knowlton, senior scientist and deputy director of the Science Center at the Natural Resources Defense Council, in a release.

Since pre-industrial times, the world's oceans have absorbed 41 percent of the carbon dioxide humans have released into the atmosphere.

In July researchers from the National Oceanic and Atmospheric Administration published findings that the oceans store almost half the anthropogenic carbon dioxide — the CO2 produced by humans — released into the atmosphere.

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

«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.

Fake paper fools global warming naysayers The man - made - global - warming - is - a-hoax crowd latched onto a study this week in the Journal of Geoclimatic Studies by researchers at the University of Arizona's Department of Climatology, who reported that soil bacteria around the Atlantic and Pacific oceans belch more than 300 times the carbon dioxide released by all fossil fuel emission, strongly implying that humans are not to blame for climate change.

When humans started draining and plowing up the natural topsoil for planting, they exposed the buried carbon to oxygen, creating carbon dioxide and releasing it into the air.

Richard Muller, founder and scientific director of the Berkeley Earth Surface Temperature Study, released a peer reviewed study concluding that climate change trends are due entirely to human carbon dioxide emissions.

Today, meeting the energy, transport and other needs of the human population releases nearly 6 billion tonnes of carbon a year into the atmosphere.

«If we want to predict more precisely how human perturbation is going to impact atmospheric CO2, and therefore climate, we have to better understand how forests take up and release carbon.»

More than 50 years later, scientists have found a way to use radioactive carbon isotopes released into the atmosphere by nuclear testing to settle a long - standing debate in neuroscience: Does the adult human brain produce new neurons?

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

Greenhouse gas emissions are again rising, and new research shows that, due to human disruptions, both Arctic permafrost and tropical forests are releasing more carbon than they're storing.

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.].

Or, after eating fruits and vegetables, animals and humans release the plants» carbon as either carbon dioxide while breathing or as methane during digestion.

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

But during a severe drought in 2005 it went into reverse, releasing 1 petagram of carbon (1 billion tons — about one - tenth of annual human emissions) to the atmosphere.

Michigan State students note how Willie Soon now refutes research indicating adverse impacts from ocean acidification, a global crisis that is married to climate change (both problems stem from humans burning fossil fuels and releasing carbon dioxide into the atmosphere).

Marine scientists who met in Monaco in October 2008 released a strong statement on January 30, 2009 about ocean acidification accelerating due to increasing carbon emissions caused by human - induced climate change.

Meanwhile the environmental situation is much worse today than that report would have us believe as the human impact is not simply limited to carbon dioxide release in the atmosphere.

As plants take in carbon dioxide for photosynthesis, they release water through evapotranspiration from their leaf pores, which helps them cool down in the hot sun, much as human sweat cools us down.

As humans release ever - larger amounts of carbon dioxide into the atmosphere, besides warming the planet, the gas is also turning the world's oceans more acidic — at rates thought to far exceed those seen during past major extinctions of life.

It also acts as a carbon sink — absorbing about 30 % of atmospheric CO2 released from human activities such as burning fossil fuels...

«Climate change, as well as human - caused deforestation and biomass burning, can lead to ecological and climatic tipping points that could release massive pools of stored carbon,» said Scot Martin, the Gordon McKay Professor of Environmental Science and Engineering at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and Professor of Earth and Planetary Sciences in the Department of Earth and Planetary Sciences.

If human - caused climate change is to be slowed enough to avert the worst consequences of global warming, carbon dioxide emissions from coal - fired power plants and other pollutants will have to be captured and injected deep into the ground to prevent them from being released into the atmosphere.

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.

Many human activities — including driving cars and heating homes — release carbon dioxide, or CO2, into the air.

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.

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.

If he understood this, he would understand how humans have disrupted the carbon cycle — we are releasing carbon from long - term storage by burning fossil fuels, which is causing an imbalance in the cycle and is leading to a build of carbon in the atmosphere.

Additionally, 32,000 American scientists have signed onto a petition that states, «There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will, in the foreseeable future, cause catastrophic heating of the Earth's atmosphere and disruption of the Earth's climate...» http://www.petitionproject.org/index.html

But because they are released in tiny traces, they currently contribute less than 1 percent of the climate - warming effect from human - generated carbon dioxide.

The National Oceanic and Atmospheric Administration is reporting that the concentrations of carbon dioxide and methane, the two most important greenhouse gases released through human activities, rose in 2008.

Meanwhile the environmental situation is much worse today than that report would have us believe as the human impact is not simply limited to carbon dioxide release in the atmosphere.

«In 1997, human - caused Indonesian peat fires were estimated to have released between 13 % and 40 % of the average carbon emissions caused by the burning of fossil fuels around the world in a single year.»

There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gasses is causing or will, in the foreseeable future, cause catastrophic heating of the Earth's atmosphere and disruption of the Earth's climate.

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.

But Field has also not explained why he signed a petition stating * that there was «no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will, in the foreseeable future, cause catastrophic heating of the earth's atmosphere and disruption of the earth's climate.»

The petition read: «There is no convincing scientific evidence that human release of carbon dioxide, methane, or other greenhouse gases is causing or will, in the foreseeable future, cause catastrophic heating of the earth's atmosphere and disruption of the earth's climate.

«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.»