Not exact matches
The majority of them come from countries, such as the Philippines, India or China, which are
warmer, poorer, and more densely populated than is Canada - and where the typical person produces far fewer CO2
emissions on a
per capita basis.
Climate scientists tell us that to keep the rise of global temperature above the pre-industrial level at below 1.5 degrees Celsius (2.7 degrees Fahrenheit) in order to avoid runaway global
warming, the world must cut greenhouse gas
emissions by 15 percent
per year starting in 2020.
Yesterday, the Conservatives criticised the government's plans to deal with global
warming, arguing that cutting carbon
emissions by 60
per cent by 2050, as is proposed in the new climate change bill, was not enough.
Union activists have warned the government's plans to reduce carbon
emissions by 60
per cent before 2050 will not be adequate to stem global
warming.
Worldwide, carbon storage has the capability to provide more than 15 percent of the
emissions reductions needed to limit the rise in atmospheric CO2 to 450 parts
per million by 2050, an oft - cited target associated with a roughly 50 - percent chance of keeping global
warming below 2 degrees, but that would involve 3,200 projects sequestering some 150 gigatons of CO2, says Juho Lipponen, who heads the CCS unit of the International Energy Agency in Paris.
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.
«The president is opposed to mandatory caps on greenhouse gases, opposing a mandatory 10 -[mile -
per - gallon] increase in cars and trucks, opposing a national renewable electricity standard, opposing state efforts to cut
emissions from cars, and pushing for new sources of dangerous pollution from liquid coal,» said Rep. Ed Markey (D — Mass.), chairman of the House Select Committee on Energy Independence and Global
Warming, in a statement released after the speech.
The sum of these efforts in developing countries will reduce growth in
warming emissions by billions of metric tons of
warming gases
per year over the coming decade.
The Intergovernmental Panel on Climate Change in its first report in 1990 predicted that temperatures would
warm by 0.5 degree Fahrenheit (0.3 degree Celsius)
per decade if no efforts were made to restrain greenhouse gas
emissions.
Projections of Future Changes in Climate «For the next two decades, a
warming of about 0.2 °C
per decade is projected for a range of SRES
emission scenarios.
If greenhouse gas
emissions continue on their current trend, the rate of
warming will reach 0.7 °F
per decade and stay that high until at least 2100.
It has been estimated that to have at least a 50
per cent chance of keeping
warming below 2 °C throughout the twenty - first century, the cumulative carbon
emissions between 2011 and 2050 need to be limited to around 1,100 gigatonnes of carbon dioxide (Gt CO2).
According to a new study co-authored by Allen and published Thursday in Nature Climate Change, the eventual peak level of
warming that the planet will see from greenhouse gas
emissions is going up at 2 percent
per year, much faster than actual temperatures are increasing.
If long - term global
warming is to be limited to a maximum of 2 °C elsius above preindustrial values, average annual
per - capita
emissions in industrialized nations will have to be reduced by around 80 - 95 % below 1990 levels by 2050.
Before I had the
emissions fix, which only had a slight impact on my fuel economy, I was averaging close to 50 miles
per gallon in
warm weather with mostly highway driving without even trying.
There are up to five injections
per combustion cycle in the coldstart and
warm - up phase, which is so crucial for
emissions.
For the next two decades, a
warming of about 0.2 C
per decade is projected for a range of SRES
emission scenarios.
We find a higher sensitivity of extreme events to aerosol reductions,
per degree of surface
warming, in particular over the major aerosol
emission regions.
Each year, the Union of Concerned Scientists (UCS) gives environmental scores to automakers based on average
per - mile smog pollution and global
warming emissions of the entire fleet of vehicles sold.
Even if poor and rich countries agree, magically, to meet in the middle — at, say, 10 tons of carbon dioxide
per person
per year (about Europe's
emissions rate)-- that produces a world well on the way to centuries of
warming and coastal retreats, even at the low end of estimates of carbon dioxide's heat - trapping power.
Here's what it says: «For the next two decades, a
warming of about 0.2 °C
per decade is projected for a range of SRES
emission scenarios.
But, given the failure of decades of pledges and agreements aimed at curbing
emissions, I suggested it was time to move away from a longstanding focus on numerical goals — such as 350 (parts
per million of CO2), 80 percent (in
emissions cuts) by 2050, a 2 - degree limit on
warming — and toward the goal of maximizing the suite of traits I described in those eight words.
I don't think it will break global
warming per say, but it may reduce some
emissions in places and that does help.
To minimize the risk of dangerous global
warming, some scientists suggest keeping concentrations of heattrapping
emissions in the atmosphere below 450 parts
per million (CO2 equivalent).
Despite an approximate 35 % monthly increase in human CO2
emissions subsequent to the Super El Niño, the global
warming trend decelerated to a
per century trend some 50 % less than that prior to the El Niño event.
As
emissions continue to increase, both
warming and the commitment to future
warming are presently increasing at a rate of approximately 0.2 °C
per decade, with projections that the rate of
warming will further increase if
emission controls are not put in place.
Our current rate of
warming is approximately 0.08 °C
per decade over the past 100 years, 0.17 °C
per decade over the past 30 years, and is expected to increase in upcoming decades unless we get our greenhouse gas
emissions under control.
The annual carbon dioxide
emissions from the U.S., currently about 5,500 million metric tons
per year, only contributes roughly 0.003 °C /
per year of
warming pressure on global temperatures (see here for a handy way of making that calculation).
Although the countries of Africa have some of the lowest overall and
per capita global
warming emissions on the planet, they are also likely to suffer from some of the worst consequences of climate change.
For policy - makers, the speed of climate change over the coming decades matters as much as the total long - term change, since this rate of change will determine whether human societies and natural ecosystems will be able to adapt fast enough to survive.New results indicate a
warming rate of about 2.5 C
per century over the coming decades (assuming no attempt is made to reduce GHG
emissions).
The California Global
Warming Solutions Act aims to reduce greenhouse gas
emissions by 25
per cent by 2020 through market - based mechanisms.
The Independent Online reports that an unprecedented coalition of blue - chip US companies and environmental lobby groups will urge President Bush next week to get serious about global
warming, calling for caps on carbon dioxide
emissions that would cut greenhouse gases by 10 - 30
per cent over 15 years.
The study, entitled «State of Charge: Electric Vehicles» Global
Warming Emissions and Fuel Cost Savings Across the United States,» points out that charging an electric vehicle with coal - based electricity yields the same carbon impact as at conventional car that gets 30 miles
per gallon (mpg).
Most estimates of wind turbine life - cycle global
warming emissions are between 0.02 and 0.04 pounds of carbon dioxide equivalent
per kilowatt - hour.
To put this into context, estimates of life - cycle global
warming emissions for natural gas generated electricity are between 0.6 and 2 pounds of carbon dioxide equivalent
per kilowatt - hour and estimates for coal - generated electricity are 1.4 and 3.6 pounds of carbon dioxide equivalent
per kilowatt - hour [14].
PS IPCC had predicted
warming of 0.15 to 0.3 C
per decade in TAR and 0.2 C
per decade in AR4 — yet in actual fact, lolwot, we saw «no
warming» despite unabated human GHG
emissions.
Furthermore, Gillett et al.'s central estimate of the transient response, 1.3 °C, very closely matches the 1.2 °C and 1.5 °C alternative IPCC estimates of
warming per 1,000 GtC after 1,000 y from the end of
emissions, assuming a midrange equilibrium climate sensitivity of 3 °C to the doubling of preindustrial carbon levels (6).
If you are silly enough to contemplate a 2 ˚C rise, then just to have a 66
per cent chance of limiting
warming at that point, atmospheric carbon needs to be held to 400ppm CO2e and that requires a global reduction in
emissions of 80
per cent by 2050 (on 1990 levels) and negative
emissions after 2070.
Deep cuts in greenhouse gas
emissions of 40 to 70
per cent by mid-century will be needed to avert the worst of global
warming that is already harming all continents, a draft UN report shows.
Reputable studies have suggested that the whole thing wouldn't cost very much, either: To offset the
warming caused by all current CO2
emissions would require an outlay of at most $ 100 billion dollars
per year.
First, WORC noted that an increase in greenhouse gas
emissions would ultimately occur, contributing to global
warming, stating that «Exporting 140 million tons a year would produce roughly 280 million tons of CO2
per year.»
Eighty seven
per cent of all IPCC climate scenarios make it clear that negative
emissions are absolutely necessary in order to keep global
warming below 2 °C.
They estimate the relationship between observed
warming and observed cumulative CO2
emissions, calculating the «transient climate response to cumulative
emissions» — the amount of
warming per teratonne carbon (TtC, or 1000 gigatonnes carbon).
A global phase - down could avoid 1.1 — 1.7 billion metric tons CO2 equivalent (CO2 equivalent is a measure used to compare impacts of greenhouse gases based on their global
warming potential in relation to CO2) of GHG
emissions per year by 2030, with cumulative
emission reductions of nearly 100 billion metric tons CO2 equivalent by 2050.
As it appears that
warming has been rather constant over the last 200 + years, at about 0.5 deg C
per century, then one can not make any attribution to a contribution to
warming by man's
emissions.
By process of elimination, there is net flow of CO2 into vegetation / land (with
emissions from them being overall negative aside from fuel combustion), which is unsurprising in contexts ranging from a multitude of studies on co2science.org to how satellite - measured global net terrestrial primary production increased by several percent
per decade during the period of global
warming (Nemani et al. 2003, for instance).
Posted by Olive Heffernan on behalf of Paty Romero Lankao It does make sense to compare the
per capita CO2
emissions of Mexico City and Los Angeles (see figure below) to illuminate the debate on shared but differentiated responsibilities on greenhouse gases
emissions and show that just as urban centers register different levels and paths of economic development, cities do not contribute at the same level to global
warming.
It does make sense to compare the
per capita CO2
emissions of Mexico City and Los Angeles (see figure below) to illuminate the debate on shared but differentiated responsibilities on greenhouse gases
emissions and show that just as urban centers register different levels and paths of economic development, cities do not contribute at the same level to global
warming.
Clearly, any
warming impact of CO2
emissions has barely surpassed the
per century trend produced by natural climatic forces from 1919 - 1943.
Even if natural gas combustion creates approaching 50 percent less CO2 equivalent
per unit of energy produced, an amount which is well beyond best case on ghg
emission reductions, it will not create the much greater
emissions reductions necessary in the next 30 years to give any hope of limiting
warming from exceeding levels that will cause catastrophic impacts.