Sentences with phrase «dangerous effects of a warming»

Even in the best - case scenario, the one seized upon by Gardner in Brown, in which humans turn out to have the least possible effect on the climate, we'll still only be able to avoid the most dangerous effects of warming if our extremely good luck is coupled with aggressive steps taken to reduce emissions.

In a new paper, the climate scientist Professor James Hansen and a team of international experts found the most dangerous effects of a warming climate — sea level rise, Arctic ice melt, extreme weather — would begin kicking in with a global temperature rise of 1C.

Not exact matches

The theory of dangerous climate change is based not just on carbon dioxide warming but on positive and negative feedback effects from water vapor and phenomena such as clouds and airborne aerosols from coal burning.

They tend to believe that as the planet warms, low - level cloud cover will increase, thus increasing planetary albedo (overall reflectiveness of the Earth), offsetting the increased greenhouse effect and preventing a dangerous level of global warming from occurring.

To stand the best chance of keeping the planetary warming below an internationally agreed target of 3.6 degrees Fahrenheit above preindustrial levels and thus avoiding the most dangerous effects of climate change, the panel found, only about 1 trillion tons of carbon can be burned and the resulting gas spewed into the atmosphere.

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It might be that serious authorities such as Hansen and the head of the UNFCCC secretariat are wrong to declare that goal of a 2.0 C ceiling of warming poses unacceptably dangerous climate destabilization, but it seems widely accepted that a peak of 450ppmv CO2 would allow a near - even chance of staying below 2.0 C and thereby avoiding the feedbacks taking off with catastrophic effects.

The actual observed effects of the warming that has already occurred, as a result of the greenhouse gases we have already emitted, are self - evidently already «dangerous» since they are already causing massive and costly harm.

And, quite disturbingly, with a manifest warming of only 0.8 ºC, we are already seeing effects − such as the precipitous receding of the Arctic sea ice − that are not only dangerous in themselves but also producing positive feedbacks that accelerate the warming.

That's a dangerous combination, since urban populations are more at risk of disruption from the effects of global warming.

That is decidedly not how this paper is used in public discourse though, I think in many instances this paper is used to say that not only do humans cause global warming, but they are also the major cause and the degree of effect on nature / climate is in some way dangerous and needs to be mitigated.

While the greenhouse effect is undeniably real, and while most scientists agree that there has been a rise in global temperatures caused in some part by human emissions of carbon dioxide, no one knows how much more warming will occur this century or whether it will be dangerous.

For details on the wide - ranging — and dangerous — effects of warmer air, see the pages on Health, Food, Water Use, Extreme Wet, Extreme Dry and Land Ecosystems.

Such higher levels of warming would make it much more difficult for countries to keep the global temperature rise to below 2C, as they agreed to do at the landmark Paris climate summit last year, to avoid dangerous extreme weather and negative effects on food security.

Urban heat islands are a dangerous effect of global warming, and some cities are taking action to combat it.

Most of your readers are probably unaware of the fact that doubling carbon dioxide in itself only produces a modest warming effect of about 1.2 C and that to get dangerous warming requires feedbacks from water vapour, clouds and other phenomena for which the evidence is far more doubtful.

A (2) Modern warming, glacier and sea ice recession, sea level rise, drought and hurricane intensities... are all occurring at unprecedentedly high and rapid rates, and the effects are globally synchronous (not just regional)... and thus dangerous consequences to the global biosphere and human civilizations loom in the near future as a consequence of anthropogenic influences.

From hazardous effects causing potential loss of life, injury, or other negative health impacts, to the potential exposure of social, economic, and infrastructure assets to adverse impacts, global warming places vulnerable human lives and systems in dangerous jeopardy.

I will continue to fight for the health of the waters off of New England and the United States, and against the dangerous effects of global warming on oceans everywhere.

Although a limited range of positive effects of global warming on humans have been identified, the overwhelming majority of effects are increasingly dangerous.

Whereas the reports of the United Nations» Intergovernmental Panel on Climate Change (IPCC) warn of a dangerous human effect on climate, NIPCC concludes the human effect is likely to be small relative to natural variability, and whatever small warming is likely to occur will produce benefits as well as costs.

On that basis alone the cooling effect of the oceans would dictate that it would take many millennia for any warming effect in the air from extra CO2 to become measurable let alone dangerous.

Among other things, the authors state that [1] «scientists do not know how large the greenhouse effect is, whether it will lead to a harmful amount of global warming, or (if it will) what should be done about it» (p. 560); [2] that «profound disagreements» about global warming exist within the scientific community (p. 560); [3] that so - called «activist scientists» say that the earth's climate is warming (p. 560); [4] that «science doesn't know whether we are experiencing a dangerous level of global warming or how bad the greenhouse effect Is, if it exists at all» (p. 569); [5] and that global warming is «enmeshed in scientific uncertainty» (p. 573).

We can help to avoid the dangerous effects of global warming by enacting strong and mandatory policies to shift to renewable sources of energy and improve energy efficiency.

Few have suggested that below 2º C of warming the effects will be beneficial; the goal of setting that target is to avoid the most dangerous impacts of climate change, and some still say it's too high.