Sentences with phrase «on carbon dioxide levels»

This lesson focuses specifically on carbon dioxide levels and does not make the connection to the rise in Earth's mean surface temperature.

What effect does that have on carbon dioxide levels in the ocean?

He points to mitigation efforts discussed at Copenhagen, such as REDD (reduced emissions from forest deforestation and forest degradation), which would encourage forest preservation, thereby both helping to put the brakes on carbon dioxide levels and providing more room for many species to move — a plan he calls a «win - win situation.»

Not exact matches

Allen notes that there are lots of consumer - friendly carbon dioxide detectors on the market, adding that the research found that people performed best at CO2 levels of 500 to 600 ppm.

While U.S. power plants have limits on other air - born pollutants — like nitrogen and sulfur oxides that cause acid rain — there haven't been limits, until now, on the levels of carbon dioxide emissions that power plants can emit.

In addition to the effect on soil from tilling, emissions from the farm tractors increases carbon dioxide levels in the atmosphere.

-LRB-... The level of the most important heat - trapping gas in the atmosphere, carbon dioxide, has passed a long - feared milestone, scientists reported Friday, reaching a concentration not seen on the earth for millions of years.

The U.S. power sector must cut carbon dioxide emissions 30 percent by 2030 from 2005 levels, according to federal regulations unveiled on Monday that form the centerpiece of the Obama administration's climate change strategy.

He was a leader elected on a manifesto commitment to cut levels of carbon dioxide by 20 % by 2010 from 1990 levels.

On this week's show: New research shows psychoactive drugs were present at the dawn of the first complex societies, and a long - term study that questions how plants will deal with rising carbon dioxide levels

GREENHOUSE GASSED In a long - running field experiment in Minnesota, scientists are studying the effects of rising atmospheric carbon dioxide levels on plots of grassland.

Ocean acidification, which is a direct consequence of increased atmospheric carbon dioxide levels, is expected to have a deleterious effect on many marine species over the next century.

An international team examining the impact of ocean acidification on coral has found that a key reef - building coral can, over a relatively short period of time, acclimate to a doubling of atmospheric carbon dioxide levels.

The indirect effects of rising atmospheric carbon dioxide (CO2) levels, such as changes in soil moisture and plant structure, can have a bigger impact on ecosystems than previously thought.

Taken together, the research data provides a picture, from the leaf scale to the global scale, suggesting that droughts in the Amazon basin are affecting levels of carbon dioxide in the atmosphere globally, both on a short - term basis though decreasing photosynthesis and on a longer term basis, by increasing tree mortality.

Previously, scientists had relied on these sorts of soil sample measurements primarily to study plant types and atmospheric carbon dioxide levels.

About 6000 years ago, levels of atmospheric carbon dioxide rose — and until now slash - and - burn by the 12 million humans on the planet at the time has been blamed.

Landerer and his colleagues modelled the changes that would occur if the most realistic estimates made by the Intergovernmental Panel on Climate Change — a doubling of carbon dioxide levels by 2100 compared with 2000 — were to become reality.

Projected carbon dioxide (CO2) emissions from cars could remain level at three gigatons through 2050 despite many more personal vehicles on the road with only minor and affordable changes to existing engines, chassis and systems, according to a new report.

Climate change's negative effects on plants will likely outweigh any gains from elevated atmospheric carbon dioxide levels

The Electric Power Research Institute's report on decarbonizing electricity generation said an «aggressive» push on new technologies could lower 2005 - level carbon dioxide emissions from power plants by 41 percent in 2030.

In fact, it will take many thousands of years for the excess carbon dioxide to completely leave the atmosphere and be stored in the ocean, and the effect on temperature and sea level will last equally long.»

New data on the relationship among carbon dioxide, sea level and temperature over the last 20,000 years was the basis for looking forward 10,000 years.

It included graphs that appeared to show a remarkably close correlation between solar activity and terrestrial temperatures — suggesting that other factors, such as carbon dioxide levels, have little influence on global temperatures.

Previous studies have suggested that temperature and, more specifically, atmospheric carbon dioxide levels influence body size more via an indirect impact on food availability and nutritional content.

Scientists have measured remarkably high levels of carbon dioxide (CO2) in the soil near dead trees on the flanks of California's Mammoth Mountain, a dormant volcano.

«Discovery provides insights on how plants respond to elevated carbon dioxide levels.»

Ongoing projects at Biosphere 2 include research on the impact of increasing carbon dioxide levels on coral reefs and forests.

On May 9, 2013, the Mauna Loa observatory in Hawaii recorded carbon dioxide levels climbing above 400 ppm for the first time.

«Significant increases in summer temperatures will affect the carbon cycling in the lakes, with potential consequences on atmospheric carbon dioxide levels and the Earth's climate,» he added.

While opponents of the measure have questioned links between carbon dioxide levels and emergency - room visits, evidence is piling on and health advocates are calling for action (ClimateWire, June 3).

The research focused on a time that marked a change between a period of high carbon - dioxide levels in the atmosphere similar to modern day and much lower levels similar to the period before the industrial revolution, Pullen said.

In the global effort to mitigate carbon dioxide levels in the atmosphere, all options are on the table — including help from nature.

Today we are pushing the carbon dioxide level to a height it last reached 24 million years ago, when there was a lot less ice on Earth and the climate was very different.

«Influence of increasing carbon dioxide levels on the seabed: Storing CO2 below the seabed is one way to counteract increasing atmospheric CO2 - levels.

From a quarter to half of Earth's vegetated lands has shown significant greening over the last 35 years largely due to rising levels of atmospheric carbon dioxide, according to a new study published in the journal Nature Climate Change on April 25.

In addition to the «fertiliser effect» on vegetation of rising carbon dioxide levels (12 October, p 40), the work of...

Healthy young (18 - 31 years) and older adults (55 - 74 years) with a wide range of fitness levels walked and jogged on a treadmill while researchers assessed their cardiorespiratory fitness by measuring the ratio of inhaled and exhaled oxygen and carbon dioxide.

The fertilizers farmers use on their crops today may become less efficient if carbon dioxide levels in the atmosphere keep rising.

They argue that there is something wrong with a world in which carbon - dioxide levels are kept to 450 parts per million (a trajectory widely deemed compatible with a 2 degree cap on warming) but at the same time more than a billion of the poorest people are left without electricity, as in one much discussed scenario from the International Energy Agency.

The first explanation is based on global climate change: Scientists have shown that atmospheric carbon dioxide levels declined steadily since the beginning of the Cenozoic Era, 66 million years ago.

Part of that research will require returning to the Bajau and Saluan communities, and collecting more physiological measurements beyond spleen size — such as levels of carbon dioxide and oxygen in the blood, says Cynthia Beall, an evolutionary anthropologist at Case Western Reserve University who did not work on the study.

Fossil - fuel use sends high levels of carbon dioxide into the atmosphere, but high levels of carbon dioxide aren't fingerprints of intelligent life, Shostak said — you can find tons of carbon dioxide on Venus.

For example, a large body of research has found switching to an entirely vegetarian diet would make a huge difference on the carbon footprint of our food system — the Climate Change, Agriculture and Food Security research program reports that if the global population were to reduce or cut its meat intake, it would halve the cost of mitigation actions needed to stabilize carbon dioxide levels to 450 parts per million by midcentury — but for many people that is not in the cards.

Earlier today, The Hill newspaper reported that the plan «would roll back funding for nuclear physics and advanced scientific computing research to 2008 levels, eliminate the Office of Electricity, eliminate the Office of Energy Efficiency and Renewable Energy and scrap the Office of Fossil Energy, which focuses on technologies to reduce carbon dioxide emissions.»

But it will have little effect on levels of carbon dioxide, because we will buy power, houses and refrigerators from people under little pressure to make them more efficient.

«With a warming climate, rising carbon dioxide levels, dams on more rivers than not, and overloading of nutrients into our waterways, the magnitude and duration of toxic cyanobacterial blooms is only going to get worse.»

«For all types of ecosystem the results show that high carbon dioxide levels can impede plants» ability to absorb nitrogen, and that this negative effect is partly why raised carbon dioxide has a marginal or non-existent effect on growth in many ecosystems,» says Johan Uddling.

Columbia University physicist Peter Eisenberger created an effective model that proves, through real world testing, that carbon sequestration can be used on a global scale and can prevent the atmospheric levels of carbon dioxide from ever exceeding 450 ppm, below dangerous levels.

Doniger notes that Bush has refused to sign on to a plan that calls for a 50 percent cut in carbon dioxide and other greenhouse gases by 2050 or to an effort to hold average temperatures from rising by more than 2 degrees Celsius (3.6 degrees Fahrenheit) above preindustrial levels, as have been proposed by other countries.