«When taking into account that production of the far smaller batteries of plug - in hybrids is associated with less carbon dioxide
emissions than production of the larger batteries of electric vehicles, their carbon dioxide balance is even better,» says Patrick Jochem of KIT's Institute for Industrial Production.
Not exact matches
The new frozen - food entrée tray reduces green house gas
emissions by more
than 45 percent during
production, compared with CPET.
«The
emissions factors used by Fonterra, FrieslandCampina and Arla are indeed less
than the
emissions factors provided by the FAO's GLEAM for their regions of
production,» they continued.
I was under the impression, when recalling seminars from over a year ago, that cement
production was higher on the list of CO2
emission causes
than it really is (apparently).
Such so - called in situ
production requires less water but far more energy to get the bitumen flowing, resulting in greenhouse gas
emissions some 2.5 times higher
than those from mining.
«Our four - year study suggests that AMP grazing can potentially offset greenhouse gas
emissions, and the finishing phase of beef
production could be a net carbon sink, with carbon levels staying in the green rather
than in the red.»
Algae
production consumes more energy, has higher greenhouse gas
emissions and uses more water
than other biofuel sources, like corn, switch grass and canola, Clarens and his colleagues found by using a statistical model to compare growth data of algae with conventional crops.
Peter Ryan's letter makes a good argument for taxing carbon
emissions on the consumption rather
than production of goods (22/29...
Coal - powered synthetic natural gas plants being planned in China would produce seven times more greenhouse gas
emissions than conventional natural gas plants, and use up to 100 times the water as shale gas
production, according to a new study by Duke University researchers.
Coal - powered synthetic natural gas plants being planned in China would produce seven times more greenhouse gas
emissions than conventional natural gas plants, and use up to 100 times the water as shale gas
production, according to a new study.
His team's work suggests that
emissions from pneumatic controllers and other equipment at
production wells is between 57 - 67 % higher
than the current EPA estimate.
Environmental controls designed to prevent leaks of methane from newly drilled natural gas wells are effective, a study has found — but
emissions from existing wells in
production are much higher
than previously believed.
Total annual
production emissions, averaged over five years, would equal about 100 grams of carbon dioxide per megajoule — which is 7 percent greater
than gasoline
emissions and 62 grams above the 60 percent reduction in greenhouse gas
emissions as required by the 2007 Energy Independence and Security Act.
A new study finds that methane
emissions from shale gas
production are nearly 50 times lower
than previous estimates, improving the climate benefit of switching from coal to natural gas.
Global methane and ethane
emissions from oil
production from 1980 to 2012 were far higher
than previous estimates show, according to a new study which for the first time takes into account different
production management systems and geological conditions around the world.
One of the big takeaway from the big UT Austin / Environmental Defense Fund (EDF) methane leakage study released today is
emissions rates are actually lower in some parts of the
production process
than initially thought.
«When it comes to life cycle greenhouse gas
emissions, wind and solar energy provide a much better greenhouse gas balance
than fossil - based low carbon technologies, because they do not require additional energy for the
production and transport of fuels, and the technologies themselves can be produced to a large extend with decarbonized electricity,» states Edgar Hertwich, an industrial ecologist from Yale University who co-authored the study.
Electricity
production from biomass, coal, gas and hydropower for instance induces much higher indirect greenhouse gas
emissions than nuclear electricity, or wind and solar - based power supply.»
Emissions of CO2 by human activities, including fossil fuel burning, cement
production, and gas flaring, amount to about 27 billion tonnes per year (30 billion tons)-LSB-(Marland, et al., 2006)-- The reference gives the amount of released carbon (C), rather
than CO2, through 2003.].
Each year more
than a quarter of global CO2
emissions from burning fossil fuels and cement
production are taken up by the Earth's oceans.
Raymond Pierrehumbert, an Oxford University atmospheric physics professor who believes cutting carbon dioxide
emissions is more urgent
than cutting methane
emissions, said Howarth's research offers little new information about the role of natural gas
production in global warming.
Considering that electricity
production generates more
than 1.9 billion metric tons of carbon dioxide
emissions a year, a simple flick of the switch is a good start.
For instance, total greenhouse gas
emissions from textiles
production, at 1.2 billion tonnes annually, are more
than those of all international flights and maritime shipping combined.
The new engine doesn't actually go into
production until September, so Peugeot is reluctant to release finalised
emissions and economy data, only saying the new 1.5 will be four to six per cent more efficient
than its 88kW 1.6 - litre predecessor.
The
production car, set to launch until the end of the decade, will be only the first of four electric Mercedes models with other three zero
emissions models planned beyond 2020: another sedan slotted between the C and the E-Class, plus two SUVs, one bigger
than the GLC and one placed above the GLE.
Volkswagen already has a turbocharged diesel engine that uses a catalyst to produce lower exhaust
emissions and fuel consumption
than any other automotive diesel in
production.
But with combined city / highway fuel economy of more
than 63 mpg (U.S.) and a CO2
emission rating of just 159 grams per mile, it will be among the company's most frugal
production cars.
Research shows that the
production of meat products for consumption produces double the amount of
emissions than growing vegetables produces.
~ 13 times less
than land use changes (3.4 gigatons) ~ 11.5 times less
than light - duty vehicles (3.0 gigatons) ~ 5.3 times less
than concrete
production (1.4 gigatons) ~ 2 dozen 1000 MW coal - fired power plants (2 % of the world's coal - fired electrical generation) Or, roughly the same CO2
emissions as Pakistan, Kazakhstan, Poland or South Africa.
With 100 % wind energy from Green Mountain, we have now reduced our GHGs more
than 1/2, maybe more
than 3/4 from our 1990
emissions (also counting water & products, which entail GHGs in their
production).
Their conclusion is that upstream
emissions are low, 0.42 % of natural gas
production (lower
than we estimated for shale gas back in our April 2011 paper, and towards the low end of what we estimated for conventional natural gas).
The information I could find on US bioethanol is not encouraging — according to a recent University of Berkley study (see here Source: http://rael.berkeley.edu/EBAMM/FarrellEthanolScience012706.pdf), US bioethanol has 13 % less greenhouse gas
emissions than diesel or petrol, because of the energy intensive refining process, the energy input to farming, and fertilizer
production and use.
Howarth: Our study bolsters recent smaller - scale studies that hinted that methane
emissions associated with energy
production may be higher
than previously estimated.
Despite the fact that livestock
production contributes more greenhouse gas
emissions than the entire transport sector, there is an appalling unwillingness to change eating habits in order to make a difference.
That said, reducing
emissions by blocking the pipeline would likely be far more costly (primarily in terms of higher world oil prices but also, potentially, in terms of reduced Bakken
production)
than almost any other
emissions - cutting approach that serious people contemplate.
Reusing paper could reduce
emissions by 50 to 80 percent over paper recycling, which, while far better from an
emissions and resource - use perspective
than new paper
production, still uses a lot of energy, water and chemicals to get the job done.
The critical question is: Given the current extent of U.S. natural gas
production — and the fact that
production is projected to expand by more
than 50 percent in the coming decades — are we doing everything we can to ensure that
emissions are as low as is technologically and economically feasible?
And yet Norway continues to plan for new
production, with proposed expansions that contain 150 % more greenhouse gas
emissions than already committed through existing projects.»
In addition, studies show that methane
emissions are higher for hydraulic fracturing of shale gas
than conventional natural gas
production.
They add: «Direct air capture could become a major industry if the technology matures and prices drop dramatically... Direct air capture might require much less land [
than other negative
emissions techniques], but entail much higher costs and consumption of a large fraction of global energy
production.
While the greenhouse gas footprint of the
production of other foods, compared to sources such as livestock, is highly dependent on a number of factors,
production of livestock currently accounts for about 30 % of the U.S. total
emissions of methane.316, 320,325,326 This amount of methane can be reduced somewhat by recovery methods such as the use of biogas digesters, but future changes in dietary practices, including those motivated by considerations other
than climate change mitigation, could also have an effect on the amount of methane emitted to the atmosphere.327
Because so little energy is required to cultivate crops such as switchgrass for cellulosic ethanol
production, and because electricity can be co-produced using the residues of such cellulosic fuel
production, reductions in greenhouse gas
emissions for celluslosic ethanol when compared to gasoline are greater
than 100 per cent.
To achieve the maximum climate benefits of bioenergy in terms of greenhouse gas
emissions avoided, the amount of carbon dioxide released during biomass
production, processing, transportation and use should be equal to or smaller
than the amount that was absorbed by the harvested biomass.
discounting the final consumption phase of the life - cycle assessment (which can contribute up to 70 % -80 % of Well - to - Wheel
emissions), Well - to - Tank (i.e., «
production») GHG
emissions are, on average, 72 % -111 % higher for Canadian oil sands crude
than for the weighted average of transportation fuels sold or distributed in the United States;
When an electric car rolls off the
production line, it's already been responsible for more
than 25,000 pounds of carbon - dioxide
emission.
Methane
emissions from 1990 - 2015 associated with the natural gas industry declined by 18.6 percent as U.S. natural gas
production increased by more
than 50 percent
Tar sands oil is one of the dirtiest fossil fuels in commercial
production today and produces three to five times more climate changing
emissions than conventional crude oil.
This report found that direct measurements of methane
emissions from 190 onshore natural gas sites in the United States indicate that methane
emissions from completed wells are are lower
than commonly thought although the report also acknowledged that
emissions from pneumatic controllers and other equipment associated with natural gas
production facilities were higher
than previously estimated.
This is followed by the claim that to avoid things like reduced agricultural
production and several meters of rise in sea level, «our net annual
emissions of CO2 must be reduced by more
than 50 percent within this century.»
And as the Natural Resources Defense Council's Max Baumherner noted, the study used estimates for
production emissions that are three times higher
than those from Argonne National Laboratory, which perhaps explains why other studies have found greater environmental benefits from electric cars.