Not exact matches
The UK will be the deciding
factor in an EU debate on carbon dioxide
emissions standards for new cars tomorrow,
with green groups calling on the government to hold firm.
In its 2007 report, the IPCC concluded
with 90 percent certainty that human - caused greenhouse gas
emissions have been the primary
factor in Earth's overall temperature rise since 1950.
Although natural gas generates less greenhouse gas than coal when burned, when its total life - cycle
emissions associated
with extraction and distribution are
factored in, it does not seem much cleaner than coal
Other
factors come into play: Increasing carbon dioxide
emissions worldwide are making all oceans more acidic, forcing species to use more energy to adapt, leaving them
with less energy to reproduce and grow.
Carman and other advocates say they understand
emission factors will have to be used in some circumstances, and that some types of pollution can be estimated
with reasonable accuracy.
«Consumers often equate more dependence on pasture
with environmentally friendly farming, but this study demonstrated that low milk production per cow is a major
factor associated
with high GHG
emission.
The EPA's IG came back
with a targeted reproach in 2014, questioning the validity of
factors used to estimate methane
emissions from some pipelines.
Many
emission factors used to estimate releases of methane — a potent greenhouse gas associated
with oil and natural gas development — are «far too low,» says Robert Howarth, an ecology and environmental biology professor at Cornell University.
Carnegie's Caldeira and Zhang, along
with Myhrvold, aimed to identify the key
factors that are responsible for most of the difference in greenhouse gas
emissions between individual gas and coal plants.
The findings from that multi-state, multi-partner study, along
with other
factors, led to the enactment of the Clean Smokestacks Act in 2002, a state law that mandated significant reductions in
emissions from coal - fired power plants.
«(I) The Administrator shall determine the amount of fossil fuel - based electricity delivered at retail by each electricity local distribution company, and shall use appropriate
emission factors to calculate carbon dioxide
emissions associated
with the generation of such electricity.
Other notable
factors are a lower proportion of diesel - powered engines across the Australian car and LCV fleet than in Europe, fewer government incentives for lower -
emissions vehicles and relatively low fuel prices compared
with Europe.
The frontal area is also a determining
factor in selecting an incomplete vehicle that complies
with emissions requirements
The scores are tabulated by combining a vehicle's tailpipe
emissions,
with the
emissions resulting from the vehicle's manufacturing process, and
factors related to how its fuel source (s) are produced and delivered.
Another key
factor behind the impressive output and fuel consumption at full load
with respect to
emissions is the maximum ignition pressure.
The continued improvement in engine performance and driving attributes, coupled
with reductions in fuel consumption and
emissions, has been a decisive
factor in securing the pioneering status of the BMW 3 Series.
These
factors combine
with a new exhaust gas regeneration system to reduce CO2
emissions to 197 and 206g / km respectively (257 - 261g / km previously).
With the GM 2.8 L diesel gaining only 2 MPG over the 2.5 L gasoline engine, while adding 440 pounds to its curb weight, the diesel fuel economy gains are not sufficient to offset the higher emission factor for diesel fuel, with the diesel option producing 4 % more CO2 - equivalent emissions over the truck's life - cy
With the GM 2.8 L diesel gaining only 2 MPG over the 2.5 L gasoline engine, while adding 440 pounds to its curb weight, the diesel fuel economy gains are not sufficient to offset the higher
emission factor for diesel fuel,
with the diesel option producing 4 % more CO2 - equivalent emissions over the truck's life - cy
with the diesel option producing 4 % more CO2 - equivalent
emissions over the truck's life - cycle.
It reduce the
emissions from transport by a
factor of ten or more compared
with electric cars on renewable energy and a
factor of at least forty compared
with modern cars traditional and hybrid ICE cars.
Worldwide, vegetation fires are showing a trend toward longer burning periods, increased fire severity, larger areas burned and increased (mostly human caused) frequency —
with all of these
factors contributing to more damaging environmental impacts, higher shares of
emissions and increasing socioeconomic costs, including greater threats to human health and security.
If we can find no consistent correlation between TSI and temperatures during the Eighteenth and Nineteenth centuries, when CO2
emissions were clearly not yet a
factor, then the «correlation» some have claimed to have found during the early 20th century is almost certainly an artifact, i.e., a fluke,
with no real significance.
Agree
with Mr. Richards (31) that a «budget» for 1.5 C has already been exceeded — due e.g. to «thermal response
factor» (Hansen), present aerosol dimming, further
emissions during energy transition, unfolding climate feedbacks and planetary response to actual total carbon dioxide eguivalent.
We are not ready to go on the record
with the results — the comparison shows no substantive differences between to - down and bottom up measurements — which means the underlying
emissions factors can't be too far off.
With all due respect, your continued clumsy attempt to equate «CO2 emissions» with «access to energy» as a factor in human well - being is either dishonest or stu
With all due respect, your continued clumsy attempt to equate «CO2
emissions»
with «access to energy» as a factor in human well - being is either dishonest or stu
with «access to energy» as a
factor in human well - being is either dishonest or stupid.
The basic ingredients are easy to list: — absorption /
emission properties (or spectroscopic parameters) of CO2 at atmospheric pressures, i.e. data presently available from HITRAN - database combined
with models of line broadening — observed properties of the atmosphere where most important features include clouds and moisture content, but many other
factors have some influence — computer model of the transmission of radiation along the lines of MODTRAN or GENLN2
The processes of carbon release are intertwined
with multiple
factors, including microbial community composition, stability of old carbon, physical soil structure, and relative fraction of leaching to atmospheric
emission.
The first showed that acceptance of several scientific propositions — including the acceptance of HIV causing AIDS, smoking causing lung cancer, and human CO2
emissions causing global warming — were all manifestations of a common
factor, which in turn is correlated
with a
factor reflecting perceived scientific consensus.
«Combined
with a literature review, the results showed that high N2O
emissions from peat decomposition in the tropics tend to be common; which is in contrast
with most recent IPCC [Intergovernmental Panel on Climate Change]
emission factors,» she says.
The increased natural gas production and use is critically important, as it is the key
factor in reduced carbon
emissions during a period of U.S. economic expansion — a break
with historic precedent noted by the New York Times.
The new study did, which means that in addition to accounting for flights, ground transportation, and hotels, it attempted to
factor emissions associated
with manufacturing all those tchotchke you're buying at the airport and those surf»n' turf dinners you're enjoying by the beach.
First, the original
emission rates of SO2 and H2SO4 (3 % of total anthropogenic SO2 emitted) in the model (including
emissions, boundary conditions, and initial conditions) were decreased by a
factor of 4 compared
with the 2005 base case to be consistent
with the decrease in measured ambient SO2 concentrations since 2005 (SI Appendix, section 1 and Fig.
Soils are the largest single terrestrial source of carbon dioxide (CO2), but these
emissions are highly sensitive to a range of
factors associated
with climate change and human land use (1).
Coal Blooded analyzes sulfur dioxide (SO2) and Nitrogen Oxide (NOx)
emissions in conjunction
with demographic
factors — race, income, and population density — to rank the environmental justice performance of the nation's 378 coal fired power plants.
Therefore, in regions
with fewer controls, primary particulate matter
emission factors are higher, but SO2
emissions are also higher....
Requires regulations issued applicable to
emission of GHGs from new heavy - duty motor vehicles or engines to contain standards that reflect the greatest degree of
emissions reduction achievable through the application of technology that is available, giving consideration to cost, energy, and safety
factors associated
with the application of such technology.
The Kyoto Protocol's effectiveness will depend upon two critical
factors: whether Parties follow the Protocol's rulebook and comply
with their commitments; and whether the
emissions data used to assess compliance is reliable.
The exact size of the carbon budget can not be specified
with high confidence since it depends on many uncertain
factors, including
emission pathways for non-CO2 climate forcers.
with gas phase and particulate matter
emission factors.
Although many people have accepted
with half - believing and half - doubting the view that the
emission of greenhouse gases is the primary
factors in global climate change, many scientists are skeptical about this view, they have refuted this view
with plenty of evidence.»
With most scientists now recognizing that the jihad against CO2
emissions was not really supportable by the empirical evidence, new scientific efforts are being conducted to determine what are the major
factors influencing global warming / cooling.
After accounting for errors associated
with transport, planetary boundary layer height, lateral boundary conditions, seasonality of
emissions, and the spatial resolution of surface
emission prior estimates, we find that the California Air Resources Board (CARB) CH4 budget is a
factor of 1.64 too low.
... the Intergovernmental Panel on Climate Change, which includes more than 3,000 scientists from around the world, agrees that climate change is caused by a number of
factors, including excess carbon dioxide... The Government of Alberta accepts the findings of the Intergovernmental Panel on Climate Change and recognizes the need to reduce
emissions and take immediate action to deal
with the impacts of global warming.
Each of these components, C1, C2 and C3, is then associated
with some fraction of the
emissions into the atmosphere, E, and a particular removal mechanism: where b3 (= 0.1) is a fixed constant representing the Revelle buffer
factor, and b1 is a fixed constant such that b1 + b3 = 0.3 [11]; b1 represents the fraction of atmospheric CO2 that would remain in the atmosphere following an injection of carbon in the absence of the equilibrium response and ocean advection; b0 represents an adjustable time constant, the inverse of which is of order 200 years.
Direct field measurements of N2O
emissions are prohibitively costly, and the use of default values can not capture variation in
emissions associated
with weather conditions and site - specific
factors.
When you
factor in energy use and
emissions along the full fuel cycle, households
with natural gas versus all - electric appliances produce 37 percent lower greenhouse gas
emissions.
In addition, lower latitude regions typically experience higher rates of terrestrial net primary production (NPP), a
factor that has been positively correlated
with GHG
emissions from hydroelectric reservoirs (Hertwich 2013).
Von Danckelman then compares this number, which is within the current satellite - based estimations,
with industrial
emissions and concludes that biomass burning is a major climate
factor in sub-Saharan Africa.
Future
emissions were made consistent
with estimated
emissions for the year 2005, using a correction
factor in such a way that, for most gases,
emissions are equal to the «native» IAM output by 2050.
But when the
emissions associated
with imported goods are
factored in, that decline is far less impressive.
The scientific pivot to cooling confirms what many have thought and said over the last few decades: human CO2
emissions do have a warming influence on global temperatures but,
with that said, it is a minor
factor that is easily overwhelmed by both solar / cosmic and natural earthly forces.