" Columbia University </ ref > However, the incineration and burning of forest plants to clear land releases large amounts of CO < sub > 2 </ sub >, which contributes to global warming.

However, in 2010, Lomborg reversed his position and he now agrees with " tens of billions of dollars a year to be invested in tackling climate change " and declared global warming to be " undoubtedly one of the chief concerns facing the world today " and " a challenge humanity must confront ".

However, human activities, primarily the burning of fossil fuels and clearing of forests, have intensified the natural greenhouse effect, causing global warming.

However, the current global warming may result in the Earth becoming warmer than the Eemian Stage, which peaked at roughly 125, 000 years ago and was warmer than the Holocene.

However, such climate changes were nothing new ; numerous very similar warming episodes had occurred previously within the ice age of the last several million years without producing comparable megafaunal extinctions, so climate alone is unlikely to have played a decisive role.

However, the two species have mated intermittently for all that time, most likely coming into contact with each other during warming periods, when polar bears were driven onto land and brown bears migrated northward.

However, such a linking of archaeologically defined cultural entities with linguistic ones cannot be proven and it has been suggested that the increase of settlement finds in the period is more likely to have been associated with an economic boom related to the warming of climate.

However, conservation tillage systems delay warming of the soil due to the reduction of dark earth exposure to the warmth of the spring sun, thus delaying the planting of the next year's spring crop of corn.

However, satellite data show that cloud optical thickness actually increases with increasing temperature .< ref name = tselioudis-1992 > Whether the net effect is warming or cooling depends on details such as the type and altitude of the cloud ; details that are difficult to represent in climate models.

However, in the wake of the defeat of the Roads and Transit measure on the November 2007 ballot and growing concern about global warming and ever-worsening traffic congestion, recent months have a seen a surge of interest in saving the lines and using them for a commuter rail service that would link Woodinville with Bellevue and other major destinations on the rapidly growing Eastside.

However, in September 2007, Stevens said: We're at the end of a long, long term of warming.

" However, he believes that decreasing tropical cirrus clouds in a warmer world will allow more longwave radiation to escape the atmosphere, counteracting the warming.

However, some bury their eggs in other ways: there are burrow-nesters which use geothermal heat, and others which simply rely on the heat of the sun warming sand.

However, climate change may affect the biological pump in the future by warming and stratifying the surface ocean.

" However the satellite temperature record corroborates the well-documented warming trend noted in surface temperature measurements.

However, true nightmare started during winter while there was not enough firewood, so that Jews were warming themselves with burned furniture or scaffolding.

However, internal government documents show that media coverage regarding global warming have been cut by 80 percent, and strict rules and regulations have blocked scientists from talking to reporters.

However, Vale was one of four MPs issuing a dissenting report in which they stated, " We do not believe the evidence unequivocally supports the hypothesis of anthropogenic global warming ".

However, HFCs and perfluorocarbons do have activity in the entirely different realm of greenhouse gases, which do not destroy ozone, but cause global warming.

However, this reaction causes a side production of carbon dioxide and carbon monoxide which are greenhouse gases and contribute to global warming.

However, it is a member organization of the Cooler Heads Coalition which seeks to " dispel the myths of global warming by exposing flawed scientific, economic, and risk analysis.

However, there is an active debate about whether using these fuels to make hydrogen is beneficial while global warming is an issue.

However, as " the Bishop of Wakefield announced that he had thrown " such garbage " onto his fire ", and this is recorded as happening in May ( when it might have been cold in Wakefield ), the firewood may not have been needed for burning the book only, but for warming his house.

However, the field has also been impacted by the acrimony of the popular debates around global warming.

However, it was not of innocence in general that I was speaking, but of perhaps the frailest and surely the least important side of it which is innocence in romantic love.

However, in this case as elsewhere it was necessary to arrive at a single standard to be applied to all situations, representing an averaging of conditions, and thus to fix particular points in time which would be considered the dividing points between daytime and nighttime conditions.

However, the nonspecific staining by the Af in tumor sections was considered bright enough to be confused with the staining of small amounts of WTV antigen.

However, all admitted that the `` hindsight '' was not altogether lost.

However, she was able to relax and yield to the moment.

However, in this case the district manager was led to see the errors of his ways.

However, there was no real question of the justice of creating a strong Poland, both industrially and agriculturally, and one unplagued by large minorities of Germans or Russians.

However, the sovereign was not Hobbes' absolute monarch but rather the parliamentary sovereign of Austin.

However, a similar privilege was not specifically provided in section 168 for a person acquiring emergency facilities.

However, the Attorney General of California, at the request of the Secretary of Labor, sought to have the jurisdiction over the issue removed to the Federal District Court, on grounds that it was predominantly a Federal issue since the validity of the Secretary's Regulation was being challenged.

However, the Federal Court held that since the State had accepted the provisions of the Wagner-Peyser Act into its own Code, and presumably therefore also the regulations, it was now a State matter.

However nothing on four legs was supposed to be faster than a lion over a short distance, unless it was a cheetah.

However, it was virtually impossible to screen the mob outside, even if Bonner had manpower available for the purpose.

However likely it was, Pauling said, he couldn't limit himself to it.

However, Haney knew it was not a dream.

However, the confession, which was the only evidence against him, was retracted before the trial.

However, compared with March 1960 new car sales of 4,441, this March was off 23 per cent.

( However, there is little evidence that the late Lumumba was a Communist.

However, lacking requested reinforcements from McClellan, now commanding the Army of the Potomac, Pope was soundly defeated at the Second Battle of Bull Run in the summer of 1862, forcing the Army of the Potomac to defend Washington for a second time.

However Copperhead rhetoric argued that emancipation was a stumbling block to peace and reunification.

However, Plato reports that syntax was devised before him, by Prodicus of Ceos, who was concerned by the correct use of words.