Sentences with phrase «says human carbon dioxide»

The Carbon Law says human carbon dioxide (CO2) emissions must be reduced by half each decade starting in 2020.

Not exact matches

A joint statement from the National Academy of Sciences and Royal Society in Britain said «human - induced increases in CO2 (carbon dioxide) concentrations have been the dominant influence on the long - term global surface temperature increase.»

Asked on Sunday to clarify a statement he made last month that carbon dioxide — emitted from fossil fuel power plants — is not a primary contributor to climate change, Pruitt said «human activities contribute to that change in some measure.»

Rick Perry, the U.S. Secretary of Energy who infamously once said he would do away with the Department of Energy, told CNBC that he didn't believe that carbon dioxide emissions from humans are the main cause for climate change.

«Many scientists, including us, had focused mostly on the mosquito antennae» for sensing human odors outside of exhaled carbon dioxide, says senior study author Anandasankar Ray, an entomologist at the University of California, Riverside.

«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.

«Today, we are facing rising carbon dioxide contents in the atmosphere through human activities, and the amount of oxygen in the ocean may drop correspondingly in the face of rising seawater temperatures,» Lyons said.

«If all the coal - burning power plants that are scheduled to be built over the next 25 years are built, the lifetime carbon dioxide emissions from those power plants will equal all the emissions from coal burning in all of human history to date,» says John Holdren, a professor of environmental policy at Harvard University's Kennedy School of Government.

«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.

«Of the carbon dioxide human beings put into the atmosphere from the burning of fossil fuels and deforestation,» Berry says, «roughly a third remains in the atmosphere, a third goes into terrestrial ecosystems, and a third goes into the ocean.»

«Our study is about how a whole forest ecosystem consumes and produces carbon dioxide, or CO2, the main greenhouse gas linked to human - induced climate change,» says Wehr, a research associate in Saleska's lab in the UA's Department of Ecology and Evolutionary Biology.

April will be the first time in human history where levels of atmospheric carbon dioxide were higher than 400 parts per million for an entire month, one scientist who monitors the levels said.

About 18 percent of all human - made carbon dioxide emissions — or nearly 8.5 billion tons each year — comes from the burning of forests, savannahs and wood chips for fuel, said Mark Jacobson, a civil and environmental engineering professor at Stanford and the study's main author.

Armed with this information, scientists will be able to do a much better job forecasting atmospheric carbon dioxide concentrations in the future, he said, and in understanding the role of human activities on the carbon cycle.

By its placement in the film, it appears that I am saying that since carbon dioxide exists in the ocean in such large quantities, human influence must not be very important — diametrically opposite to the point I was making — which is that global warming is both real and threatening in many different ways, some unexpected.

«Ocean warming is occurring because of human carbon dioxide emissions, which warm the earth as a whole,» Weber says.

Quick progress in curbing emissions of carbon dioxide, the main human - generated greenhouse gas, could be achieved by using capital from rich countries to help prevent the destruction of tropical forests (and resulting greenhouse - gas emissions), Mr. Gore said.

The second result also comes as little news to us, as we have been saying for years that the human carbon dioxide emissions are not the only player in the climate change game.

He quotes leading author David Douglass saying; «The inescapable conclusion is that the human contribution is not significant and that observed increases in carbon dioxide and other greenhouse gases make only a negligible contribution to climate warming.»

12/19/17 — Among registered Republicans nationwide, only about half say that climate change is happening and fewer than a third say humans are responsible, yet a majority in every congressional district say they support regulating carbon dioxide as a pollutant, according to a new study.

He says «The ocean takes up roughly one quarter of human emissions to the atmosphere of carbon dioxide from fossil fuel burning and deforestation.»

«This marks the fact that humans burning fossil fuels have caused global carbon dioxide concentrations to rise more than 120ppm since pre-industrial times,» Pieter Tans, lead scientist of NOAA's greenhouse gas network, said in an interview to The Guardian Wednesday.

(through drastic slashing of manufacturing technologies, draconian cap and trade taxation, repossession of private property, and a whole host of other proceedures of questionable value), and on the other, you have the alternative medicine quack that says «The pain is all in your mind» (EG, the non-scientists that say that human released carbon dioxide has no impact on the environment whatsoever, in spite of the fact that this is not supported by even the slightest bit of chemical evidence.)

The most recent report of the International Panel on Climate Change says it is extremely likely that human influence has been the dominant cause of this warming which is driven by the build up of carbon dioxide emissions from fossil fuel combustion, cement production, and land use changes.

The sun is the primary source of heat on Earth (you don't say) and humans are not the primary source of CO2 on Earth, contributing only 7 billion tons of industrial carbon dioxide compared with natural sources that produce 200 billion tons annually.

In 1995, they said, «We have found the human influence on the climate, and in particular, it's due to our burning of coal and oil, which is building up carbon dioxide in the atmosphere.»

Scientists say it's apparent that human activity — namely burning coal, oil and natural gas — has been driving a rapid rise of carbon dioxide levels in the atmosphere.

The authors of the new report say «the net effect of continued warming and rising carbon dioxide concentrations in the atmosphere is most likely to be beneficial to humans, plants, and wildlife.»

Meanwhile, emissions of carbon dioxide from human activities may be decreasing; he said they shrank slightly in 1998 and 1999, even as the global economy grew.

In a sharp change from its cautious approach in the past, the National Academy of Sciences on Wednesday called for taxes on carbon emissions, a cap - and - trade program for such emissions or some other strong action to curb runaway global warming.Such actions, which would increase the cost of using coal and petroleum — at least in the immediate future — are necessary because «climate change is occurring, the Earth is warming... concentrations of carbon dioxide are increasing, and there are very clear fingerprints that link [those effects] to humans,» said Pamela A. Matson of Stanford University, who chaired one of five panels organized by the academy at the request of Congress to look at the science of climate change and how the nation should respond.

In the conclusion to his «Plan B» chapter (p 228), Bob Carter writes: «It is therefore time to move away from stale «he - says - she - says» arguments about whether human carbon dioxide emissions are causing dangerous warming, and on to designing effective policies of hazard management for all climate change, based on adaptation responses that are tailored for individual countries or regions... By their very nature, strategies that can cope with the dangers and vagaries of natural climate change will readily cope with human - caused change too should it ever become manifest.»

The man in charge of this is new EPA Administrator Scott Pruitt, who up to now has been cautious about saying anything that would express his skepticism that human emissions of carbon dioxide are causing global warming.

The authors of the new report go on to say «the net effect of continued warming and rising carbon dioxide concentrations in the atmosphere is most likely to be beneficial to humans, plants, and wildlife.»

«We have concluded close to all of the recent trends in global temperature is due to human activity, and CO2 is the dominant factor,» Schmidt said, referring to carbon dioxide.

«In addition to causing changes in climate, increasing levels of carbon dioxide from the burning of fossil fuels and other human activities have a direct affect on the world's oceans,» the report found, particularly an increase in levels of acidity, which it said are a threat to marine life.

However wild some of them may look, experts say, forests from the deepest Amazon to the remotest reaches of Siberia are now responding to human influences, including the rising level of carbon dioxide in the air, increasing heat and changing rainfall patterns.

Salby says there are — the huge increases in carbon dioxide concentrations caused by such things as spells of warming and El Ninos, which cause concentration levels to increase independently of human emissions.

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.

Judith Curry's states «Salby says there are the huge increases in carbon dioxide concentrations caused by such things as spells of warming and El Ninos, which cause concentration levels to increase independently of human emissions.

E.g., research assumes greenhouse gas emissions cause warming without explicitly stating humans are the cause»... carbon sequestration in soil is important for mitigating global climate change» (4a) No position Does not address or mention the cause of global warming (4b) Uncertain Expresses position that human's role on recent global warming is uncertain / undefined «While the extent of human - induced global warming is inconclusive...» (5) Implicit rejection Implies humans have had a minimal impact on global warming without saying so explicitly E.g., proposing a natural mechanism is the main cause of global warming»... anywhere from a major portion to all of the warming of the 20th century could plausibly result from natural causes according to these results» (6) Explicit rejection without quantification Explicitly minimizes or rejects that humans are causing global warming»... the global temperature record provides little support for the catastrophic view of the greenhouse effect» (7) Explicit rejection with quantification Explicitly states that humans are causing less than half of global warming «The human contribution to the CO2 content in the atmosphere and the increase in temperature is negligible in comparison with other sources of carbon dioxide emission»»

WASHINGTON (AP)-- If carbon dioxide emissions continue at their current pace, by the end of century parts of the Persian Gulf will sometimes be just too hot for the human body to tolerate, a new study says.

The faster humans limit carbon dioxide emissions, the greater the chance to avoid the most extreme scenarios, he said.

On page 3 Postma states that anthropogenic global warming means a general warming of the atmosphere theorized to be human emission of carbon dioxide (CO2), which is then theorized to cause a strengthening of the effect of the Greenhouse Theory, which actually causes said warming.

Janet Larsen from the Earth Policy Institute, says:» «With our human population expanding and resource consumption growing even faster, we are close to hitting the wall in a number of arenas — fresh water, oil reserves, minerals like phosphorous for fertilizer, oceanic fisheries, and nature's ability to absorb climate - altering carbon dioxide, among others.

By its placement in the film, it appears that I am saying that since carbon dioxide exists in the ocean in such large quantities, human influence must not be very important — diametrically opposite to the point I was making — which is that global warming is both real and threatening in many different ways, some unexpected.

«Human contribution to carbon dioxide, which is really a trace gas, is.117 of one per cent,» Prof Plimer said.

«What was surprising was just how slow the process of carbon accumulation and the development of peatland soils actually is, but when we disturb these systems through human activity, carbon dioxide is released very quickly,» said Daniel Murdiyarso, Principal Scientist at CIFOR and co-author of the report.

As I have said, the persistence of carbon dioxide in the atmosphere is the most profound and least well - known feature of human - induced climate change (Figure 5).

«Combined, the Earth's land and ocean sinks absorb about half of all carbon dioxide emissions from human activities,» said Paul Fraser of the Commonwealth Scientific and Industrial Research Organization.

The only way to do that is to reduce the output of so - called greenhouse gasses, caused primarily by carbon dioxide emissions from industry, automobiles and other human activities, Horton said.