Sentences with phrase «levels of carbon»

Our planet has had a run of at least 800,000 years with levels of carbon dioxide in the atmosphere between 170 and 300 ppm.

Recent studies have separately warned that high levels of carbon dioxide, or CO ₂, make crops less nutritious for reasons that are not totally clear, and put shellfish and other key parts of the food chain at risk by making oceans more acidic.

Higher levels of carbon dioxide in the atmosphere also mean that wheat, rice, maize, potatoes and other staples will grow with lower levels of protein — and by 2050, an extra 150 million people in 47 countries will be at greater risk of malnutrition.

This created a qualitative transformation in Homo sapiens» impact on earth system trends: levels of carbon dioxide, nitrous oxide, methane, stratospheric ozone, surface ocean temperature, ocean acidification, marine fish capture, coastal nitrogen, tropical forest depletion, land domestication and terrestrial biosphere degradation.

And that in turn could have a profound effect on the levels of carbon and nitrogen nutrients naturally in the topsoils.

The CCSM indicated that ocean waters warmed significantly at higher latitudes because of rising atmospheric levels of carbon dioxide (CO2), a greenhouse gas.

An Improved Forest Management Project under the CAR Forest Project Protocol involves changing forest management practices to increase carbon stocks on forested land relative to baseline (or «business as usual») levels of carbon stocks.

The claim that rising levels of carbon dioxide are responsible for a global warming that is not happening is entirely without scientific merit and, if for no other reason, should not be the basis for implementing EPA regulation of so - called «greenhouse gas» emissions under the Clean Air Act.

The pair looked at how predicted increased levels of carbon dioxide (CO2) in the atmosphere affect shellfish development, growth and survival.

«The question for leaders and governments everywhere is how to rein in dangerously high levels of carbon dioxide emissions without stunting development and reducing living standards,» said James Leape, WWF International's Director General.

While I acknowledge that the levels of carbon dioxide and other greenhouse gases in our atmosphere are increasing, that climate change is real, that human activity plays a role in these changes and that these changes are impacting our state, I simply disagree that RGGI is an effective mechanism for addressing global warming.

Thus it is scientifically proven that rising atmospheric levels of carbon dioxide cause global warming.»

It has been known that modern - day levels of carbon dioxide are unprecedented over the last 800,000 years, but the finding that modern levels have not been reached in the last 15 million years is new.

In climate - change discussions, two Princeton professors go against the grain By Mark F. Bernstein The issue of climate change, or global warming, has become a rallying cry: The Earthâ $ ™ s surface temperatures are Ârising due to increased levels of carbon dioxide and other Âgreenhouse gases in the atmosphere, much of it produced by human activity.

Deserts «greening» from rising carbon dioxide: Green foliage boosted across the world's arid regions Date: July 8, 2013 Source: CSIRO Australia Summary: Increased levels of carbon dioxide have helped boost green foliage across the world's arid regions over the past 30 years through a process called carbon dioxide fertilization, according to new research.

That is not the same as twice the levels of carbon dioxide in the atmosphere: what is being measured here is the extra heat that double the carbon dioxide will guarantee.

In the past 12 months the BASIC group has come under increased pressure to outline what levels of carbon cuts its members would consider.

By 1995, a group of scientists had started vocally dissenting from the emerging consensus on its anthropogenic causes, signing the Leipzig Declaration, which stated: «There does not exist today a general scientific consensus about the importance of greenhouse warming from rising levels of carbon dioxide.

As for emissions, levels of carbon dioxide associated with electricity generation are near 30 - year lows, primarily because of increased use of cleaner - burning natural gas.

Press Release 13 - 139 Seasonal carbon dioxide range expanding as more is added to Earth's atmosphere Northern Hemisphere land - based ecosystems «taking deeper breaths,» scientists find Levels of carbon dioxide in the atmosphere rise and fall each year as plants, through photosynthesis and respiration, take up the gas in spring and summer, and release it in fall...

On two previous occasions when the atmosphere contained very high levels of carbon dioxide, the early Carboniferous and Cretaceous periods, beginning about 350m and 150m years ago respectively, they were reduced by the expansion of carbon - sequestering plants.

The real threat is dangerously low levels of carbon dioxide in the atmosphere.

«Few scientists now dispute that today's soaring levels of carbon dioxide and other gases in the atmosphere will cause global temperature averages to rise by as much as nine degrees Fahrenheit sometime after the year 2000.»

If one had to live on such a carbon budget with today's low levels of carbon productivity, one would be forced to choose between a 40 kilometer car ride, a day of air conditioning, buying two new T - shirts (without driving to the shop), or eating two meals.

From the University of California — Riverside, and the department of sulfurous odors, comes this «it must be carbon dioxide» moment: «Also associated with this event are high levels of carbon dioxide in the atmosphere, which are linked to elevated ocean and atmospheric temperatures.

There is no mention in the China Daily article about when CCICED thinks these reductions should commence, what the assumptions to GDP growth are till 2050, nor what levels of carbon emissions will result by 2050 if such measures were taken.

The 400 ppm measurement is a record daily average, since the levels of carbon dioxide fluctuate by season and by location.

The levels of carbon dioxide in the atmosphere today are higher than they have been at any time in the past 3 - 5 million years, and in 2013, CO2 levels surpassed 400 parts per million (ppm) for the first time in recorded history.

Indeed, the map at which JAXA spokesman Sasano was pointing (see photo above) had been expected by most experts to show that western nations are to blame for substantial increases in atmospheric levels of carbon dioxide, causing global warming.

As I explained in a recent Nature online article, the latest IPCC report finds that, absent a sharp reversal of BAU trends, we are headed toward atmospheric levels of carbon dioxide far exceeding 1,000 parts per million by 2100.

Agricultural production has increased substantially and the Earth is greener today with the 400 ppm current levels of carbon dioxide than it was with preindustrial levels of about 280 ppm.

««deny the fact that increasing levels of carbon dioxide in the environment have trapped heat, causing an increase in the Earth's surface temperature... and consequent climate disruption».»

Hefty chapters summarize thousands of peer - reviewed studies of the impact of rising levels of carbon dioxide — a greenhouse gas produced during the burning of fossil fuels — on plants and soils, agriculture, forests, wildlife, ocean life, and humankind.

Anyone who says «the fact that increasing levels of carbon dioxide in the environment have trapped heat» is a scientific charlatan and there is no need to read any further.

Ice core records prove that current levels of carbon dioxide and methane, both important greenhouse gases, are higher than any previous level in the past 400,000 years.

Anthony watts is listed as a signatory of the Leipzig Declaration which states that «there does not exist today a general scientific consensus about the importance of greenhouse warming from rising levels of carbon dioxide.

To combat rising levels of carbon dioxide — a «greenhouse gas» that traps heat from the sun — some researchers have suggested seeding the oceans with iron.

Over the last 30 years, atmospheric levels of carbon dioxide increased by about 15 percent, from about 328 parts per million to about 372 parts per million.

Climate scientists agree that rising levels of carbon dioxide and other greenhouse gases trap incoming heat near the surface of the Earth and are the key factors causing the rise in temperatures since 1880, but these gases are not the only factors that can impact global temperatures.

Yet, in an article for one of the sillier groupthink websites, he considers himself qualified to state that the «climate denialists» President Trump and his appointees to EPA and Energy, Scott Pruitt and Rick Perry, «deny the fact that increasing levels of carbon dioxide in the environment have trapped heat, causing an increase in the Earth's surface temperature... and consequent climate disruption».

We support our clients through all levels of the carbon compensation process with, including carbon footprints, the development of emission reduction strategies, and advise on how to select or develop climate protection projects that best suit your needs.

SciDev.Net: LIMA - Rising levels of carbon dioxide (CO2) in the atmosphere caused by human - driven emissions might lead to larger sweet potatoes, a staple food for many African and Asian countries, research reveals.

The cores show that modern levels of carbon dioxide, methane, and nitrous oxide levels are the highest they have ever been.

A new study confirms that carbon pollution has ended the era of the stable climate conditions that enabled the development of modern civilization High levels of carbon pollution have caused global temperatures to rise above the slow - changing, relatively stable conditions that existed «when humans were figuring out where the climate — and rivers and sea levels — were most suited for living and farming.»

Our youth feel a comprehensive plan is critical because they see that our climate system is reacting to unprecedented levels of carbon in the atmosphere by behaving in unprecedented ways.

No More Sea Shells by the Sea Shore — New Evidence of the Impacts of Rising CO2 Levels Clam and scallop shells show detrimental effects from increasing levels of carbon dioxide, and even when grown under current levels.

Garden equipment engines, which have had unregulated emissions untill very recently, emit high levels of carbon monoxide, volatile organic compounds and nitrogen oxides, producing up to 5 % of the nation's air pollution and a good deal more in metropolitan areas.

Quite possibly the stratosphere is in fact cooler because higher levels of carbon dioxide may be assisting it to cool by radiating away some of the energy up there.

Scientists and policy - makers sometimes refer to the status of the unadulterated climate by the preindustrial levels of carbon dioxide, under the assumption that staying below 350 ppm would entail a climatically safer world characterized, among other things, by a decrease of anthropogenically driven extremes.

The increased levels of carbon dioxide in the atmosphere — now higher than at any time in at least the past few million years — can be found as fossil bubbles in the geologically short - lived «rock» that is polar ice.