The results suggest that 1.5 C is achievable
if global emissions peak in the next few years and massive amounts of carbon are sucked out of the atmosphere in the second half of the century through a proposed technology known as bioenergy with carbon capture and storage (BECCS).
According to recent analyses, California is projected to experience temperature increases of at least 4 - 8 degrees Fahrenheit (
if global emissions are significantly curtailed) and more likely temperature increases of 9 - 18 degrees Fahrenheit (current emissions path) over the next centur
Even
if global emissions from agriculture are 30 %, the industrialized world emits 72 % of total carbon dioxide emissions, so why should developing countries mitigate?
Prompt and stringent action to reduce greenhouse gas emissions globally would reduce these biodiversity losses by 60 per cent
if global emissions peak in 2016, or by 40 per cent if emissions peak in 2030, showing that early action is very beneficial.
«
If global emissions of carbon dioxide continue to rise at the rate of the past decade,» said Dr. Hansen, «this research shows that there will be disastrous effects, including increasingly rapid sea level rise, increased frequency of droughts and floods, and increased stress on wildlife and plants due to rapidly shifting climate zones.»
Lead author James Hansen, NASA Goddard Institute for Space Studies, New York, concludes: «
If global emissions of carbon dioxide continue to rise at the rate of the past decade, this research shows that there will be disastrous effects, including increasingly rapid sea level rise, increased frequency of droughts and floods, and increased stress on wildlife and plants due to rapidly shifting climate zones.»
If global emissions need to be cut by 50 % or 80 %, then Australia, responsible for about 1 % of global emissions, could double its emissions or go to zero without changing anything.
Annual precipitation increases of about 15 % to 30 % are projected for the region by late this century
if global emissions continue to increase (A2).
If emissions continue to increase (as in the A2 scenario), warming of 4.5 ºF to 10ºF is projected by the 2080s;
if global emissions were reduced substantially (as in the B1 scenario), projected warming ranges from about 3ºF to 6ºF by the 2080s.4
If a global emissions trading system is to be implemented, there needs to be a method of deterring free riders — countries that choose not to limit their own emissions.
Models predict that the same summertime temperatures that ranked among the top 5 % in 1950 — 1979 will occur at least 70 % of the time by 2035 — 2064 in the U.S.
if global emissions of greenhouse gases grow at a moderate rate (as modeled under the IPCC SRES A2 scenario).
This goal is deemed necessary to avoid incalculable risks to humanity, and it is feasible — but realistically only
if global emissions peak by the year 2020 at the latest.
Antarctic ice sheet models double the sea - level rise expected this century
if global emissions of heat - trapping pollution remain high.
If global emissions continue at the current trajectory, Australia is expected to warm more than 9 F by 2090.
This means that even
if global emissions were cut by 60 per cent now, which is what it would take to stabilise CO2 levels, we would still hit 1.6 °C of warming.
Even
if global emission rates are stabilized at present — day levels, just 20 more years of emissions would give a 25 % probability that warming exceeds 2 °C.
Not exact matches
«
If we're to keep
global temperatures from rising to dangerous levels, we need to drastically reduce
emissions and greatly increase forests» ability to absorb and store carbon.»
Even
if the ambitious targets of the world's biggest economies are met, and internal combustion engines give way to electric or other zero -
emission vehicles by 2040, the total impact on
global carbon dioxide
emissions will be minimal, according to a new study released Tuesday.
It will take effect in 2020 only
if it is ratified by more than 55 percent of nations, or nations that cause 55 percent of
global emissions.
In December 2015, the world agreed to the Paris Accord; to slash greenhouse gas
emissions to hold
global average temperature increase to 1.5 degrees C (over what it was before the Industrial Revolution), and,
if we miss that target, to as far below 2 degrees as possible.
Canadian liquefied natural gas can lower
global greenhouse gas
emissions if it displaces dirtier sources of power abroad, according to a new C.D. Howe Institute report.
If the goods they produced end up being imported from jurisdictions with less stringent environmental standards, then we lose twice — higher
global GHG
emissions and less economic activity in Canada.
And
if the final data does end up showing a drop in
global carbon
emissions, it will be the first time Co2 levels have dropped during a period of strong economic growth.
Earlier this year researchers calculated that
if more people went meat free then
global carbon
emissions could fall by 63 per cent and $ 1 trillion could be saved on the
global health bill, rising to $ 30 trillion factoring in lives saved.
Food waste today is responsible for around 8pc of
global greenhouse gas
emissions —
if it were a country, food waste would be the world's third - largest emitter, after China and the USA.
Separate research published by the Met Office today shows
emissions of CO2 will need to be reduced close to zero by the end of this century
if a rise in the mean
global temperature beyond 2C is to be avoided.
If global corporations are allowed to turn our state into a sacrifice zone, reap massive short - term profits, and significantly add to greenhouse gas
emissions, the true costs of drilling in terms of environmental impacts, quality of life, and long - term cleanup costs would be passed on to state residents.
The science says that industrial states like New York must get to 100 % clean energy and zero net greenhouse gas
emissions by 2030
if the planet is to avert runaway
global warming and climate catastrophe,» Hawkins said.
«Logistically, negotiations on the agreement's detailed rules will likely take another year or two to finalize, and all countries will need to raise the ambition of their commitments under the agreement
if we're to avoid the worst impacts of climate change and reach a goal of net - zero
global warming
emissions by midcentury,» said Alden Meyer of the Union of Concerned Scientists.
If similar results are found in other urban areas, then unknown urban sources could account for 7 to 15 per cent of humans»
global emissions of the gas, the researchers calculate — far more than was thought (Geophysical Research Letters, DOI: 10.1029 / 2009gl039825).
According to his calculations,
global infrared
emission would be 0.8 watts per square metre higher
if all atmospheric ice crystals contained lead compared with none.
Global warming due to mankind's greenhouse - gas
emissions from burning fossil fuels already affects the Indian monsoon and —
if unabated — is expected to do even more so in the future.
If carbon
emissions continue on their current trajectory, with
global temperatures rising by 2.6 C to 4.8 °C by 2100, applications could increase by 188 percent, leading to an extra 660,000 applications filed each year.
He also models the
global warming that would occur
if concentrations of greenhouse gases in the atmosphere were to be doubled (due to increases in carbon dioxide and methane
emissions from dragons and the excessive use of wildfire).
«
If it is significant on a
global scale, it might mean that the natural
emissions of organics is also important in cloud formation,» says Bart Verheggen of the Energy Research Centre of the Netherlands in Petten.
Researchers believe that
global warming is already responsible for some 150,000 deaths each year around the world, and fear that the number may well double by 2030 even
if we start getting serious about
emissions reductions today.
Unfortunately, even
if we curb
global warming
emissions today, these problems are likely to get worse before they get better.
And US president Barack Obama's promise to cut
emissions by between 26 and 28 per cent below 2005 levels by 2025 could materialise,
if the US adopted the
global best practices.
Imagine
if the world's two largest polluters unilaterally decide to cut
emissions of carbon dioxide, the ubiquitous gas responsible for the bulk of
global warming.
«Significant» reductions needed The U.N. Environment Programme's «
Emissions Gap 2012» report cautions that even
if nations meet their strictest pledges, the world will not be able to cut its output of greenhouse gases in time to prevent runaway
global warming (ClimateWire, Nov. 21).
Researchers estimate that
if all human - related deforestation of the tropics were to stop, the forests could absorb more carbon than at present, equivalent to one - fifth of
global emissions.
If nations hit their reduction targets,
global carbon dioxide
emissions would level off, even as electricity demand continues to rise.
In their latest paper, published in the February issue of Nature Geoscience, Dr Philip Goodwin from the University of Southampton and Professor Ric Williams from the University of Liverpool have projected that
if immediate action isn't taken, Earth's
global average temperature is likely to rise to 1.5 °C above the period before the industrial revolution within the next 17 - 18 years, and to 2.0 °C in 35 - 41 years respectively
if the carbon
emission rate remains at its present - day value.
This will intensify
global warming regardless of all efforts to reduce greenhouse gas
emissions,» said Paulo Artaxo, a professor at the University of São Paulo's Physics Institute (
IF - USP).
If we can rein in
emissions enough to keep
global average temperatures from rising 2 C (3.6 F), we can avert the biggest shocks to Earth's system, scientists say.
«We show that even
if deforestation had completely halted in 2010, time lags ensured there would still be a carbon
emissions debt equivalent to five to ten years of
global deforestation and an extinction debt of more than 140 bird, mammal, and amphibian forest - specific species, which,
if paid, would increase the number of 20th century extinctions in these groups by 120 percent,» says Isabel Rosa (@isamdr86) of the Imperial College of London.
If global levels of hydroxyl decrease, global methane concentrations will increase — even if methane emissions remain constant, the researchers sa
If global levels of hydroxyl decrease,
global methane concentrations will increase — even
if methane emissions remain constant, the researchers sa
if methane
emissions remain constant, the researchers say.
In a report last year, the
Global CCS Institute found that technologies reusing captured CO2 could play a role in controlling emissions in some markets, even if their global potential for controlling the greenhouse gas is
Global CCS Institute found that technologies reusing captured CO2 could play a role in controlling
emissions in some markets, even
if their
global potential for controlling the greenhouse gas is
global potential for controlling the greenhouse gas is small.
If only modest action is taken to reign in greenhouse gas
emissions, the model predicts that pikas will disappear from about 75 percent of sites by 2070 (51 to 88 percent, depending on the
global climate model used).
Government officials also argue that even
if Singapore stops building oil refineries, it would not make a big difference in combating
global warming because the country accounts for only 0.11 percent of
global emissions.