Sentences with phrase «gases by humanity»

Climate scientists have long warned that rising emissions of greenhouse gases by humanity may cause weather extremes, and not just heat waves.

Not exact matches

«By failing to adequately limit population growth, reassess the role of an economy rooted in growth, reduce greenhouse gases, incentivize renewable energy, protect habitat, restore ecosystems, curb pollution, halt defaunation, and constrain invasive alien species, humanity is not taking the urgent steps needed to safeguard our imperiled biosphere.»

Hawken's latest project, Drawdown, ranks 100 climate change solutions based on their ability to actually reduce humanity's greenhouse gas emissions year over year by 2050.

Earlier today I posted an essay by Robert Socolow, a seasoned energy and climate analyst at Princeton University, in which he proposes a new approach to overcoming resistance to actions that could limit emissions of greenhouse gases even as humanity's energy appetite grows in coming decades.

I'd suggest the growing body of research concluding that what was once seen as an inevitable descent into the next ice age has been put off for a very long time by the building blanket of greenhouse gases generated by humanity's burst of fossil fuel combustion.

None of this negates the importance of moving to limit emissions of long - lived greenhouse gases; the analysis just reinforces the reality that while that effort proceeds, there's plenty of other work to do, as well, if humanity desires a relatively smooth journey in this century (as was recently stressed by Robert Verchick here).

I've posted a lot on contrasting climate manifestos published in the past week by The Wall Street Journal, but it's worth adding the perspective of Richter, a physics Nobelist who's been deeply focused on humanity's energy challenge, including the climate impact of greenhouse gases.

Photo For years, politicians wanting to block legislation on have bolstered their arguments by pointing to the work of a handful of scientists who claim that greenhouse gases pose little risk to humanity.

Against such a noisy background, it is hard to detect the signal from any changes caused by humanity's increased economic activity, and consequent release of atmosphere - warming greenhouse gases such as carbon dioxide.

The basic claim of the paper is that by burning fossil fuels at a prodigious pace and pouring heat - trapping gases into the atmosphere, humanity is about to provoke an abrupt climate shift.

Goklany asks what is the basis for the claim that 450 ppm — or a maximum of 2 °C warming or a 50 % cut in global greenhouse gas emissions by midcentury — is the «correct target» for humanity.

But even if these 10 - to - 15 year plans are fulfilled, humanity will have used up three - quarters of its carbon «budget» by 2030 and must slash greenhouse gas output even more to avoid devastating climate impacts, the UN's Climate Change Secretariat warned.

There is a detailed explanation above the graph which ends with «In particular, the global heating since the 1970s can be explained only by humanity's greenhouse gas emissions.

And here's the kicker: even if humanity is reckless and immoral enough to blow past the 2 °C roadblock and cook the planet by 3 °C or 4 °C, there are still huge amounts of known oil, coal and natural gas resources that will have to stay in the ground.

By moving rapidly to a zero - carbon energy system — replacing coal, oil, and gas with wind, solar, geothermal and other zero - carbon energy sources, drastically reducing emissions of all other climate - altering pollutants and by adopting sustainable land use practices, humanity can prevent catastrophic climate change, while cutting the huge disease burden caused by air pollution and climate changBy moving rapidly to a zero - carbon energy system — replacing coal, oil, and gas with wind, solar, geothermal and other zero - carbon energy sources, drastically reducing emissions of all other climate - altering pollutants and by adopting sustainable land use practices, humanity can prevent catastrophic climate change, while cutting the huge disease burden caused by air pollution and climate changby adopting sustainable land use practices, humanity can prevent catastrophic climate change, while cutting the huge disease burden caused by air pollution and climate changby air pollution and climate change.

«Climate science» as it is used by warmists implies adherence to a set of beliefs: (1) Increasing greenhouse gas concentrations will warm the Earth's surface and atmosphere; (2) Human production of CO2 is producing significant increases in CO2 concentration; (3) The rate of rise of temperature in the 20th and 21st centuries is unprecedented compared to the rates of change of temperature in the previous two millennia and this can only be due to rising greenhouse gas concentrations; (4) The climate of the 19th century was ideal and may be taken as a standard to compare against any current climate; (5) global climate models, while still not perfect, are good enough to indicate that continued use of fossil fuels at projected rates in the 21st century will cause the CO2 concentration to rise to a high level by 2100 (possibly 700 to 900 ppm); (6) The global average temperature under this condition will rise more than 3 °C from the late 19th century ideal; (7) The negative impact on humanity of such a rise will be enormous; (8) The only alternative to such a disaster is to immediately and sharply reduce CO2 emissions (reducing emissions in 2050 by 80 % compared to today's rate) and continue further reductions after 2050; (9) Even with such draconian CO2 reductions, the CO2 concentration is likely to reach at least 450 to 500 ppm by 2100 resulting in significant damage to humanity; (10) Such reductions in CO2 emissions are technically feasible and economically affordable while providing adequate energy to a growing world population that is increasingly industrializing.

Nevertheless, it seems likely that a CO2 concentration in the range 500 to 900 ppm might produce a temperature rise of at least 2 °C from the late 19th century that could be problematic for humankind; (7) The potential negative impact on humanity has been exaggerated; (8) The only alternative to rising greenhouse gas concentrations is to immediately and sharply reduce CO2 emissions — whether this averts a «pending disaster» is not well understood; (9) Even with such draconian CO2 reductions, the CO2 concentration is likely to reach at least 450 to 500 ppm by 2100 probably resulting in some warming; (10) Such reductions in CO2 emissions are neither technically feasible nor economically affordable, and would necessitate inadequate energy supply to a growing world population that is increasingly industrializing, leading to worldwide depression.

Speaking last week at the London School of Economics, Lord Giddens also warned of the dangers posed by rapidly increasing greenhouse gas levels: «Climate change is the most formidable problem humanity faces in the 21st Century.

Led by Sen. James Inhofe, who has called climate change «the greatest hoax» committed against humanity, the powerful Environment and Public Works Committee plans to explore a wide range of measures that would slow or halt Environmental Protection Agency rules to cut greenhouse gas emissions.

Mitigation was taken to refer to any set of actions intended to reduce humanity's output of greenhouse gases, either by curbing them at their source, for example, by switching to non-carbon fuels or by increasing the capacities of carbon sinks — systems that absorb carbon dioxide.

The ancient ice ages were the reverse of our current situation, where humanity was initiating the change by adding greenhouse gases.

Or, more ominously, how a change in the gas level initiated by humanity might be amplified through a temperature feedback loop.