Sentences with phrase «by methane leakage»

; and that «the benefits of cleaner, more efficient combustion of natural gas are largely offset by methane leakage in U.S. production and pipelines and by methane leaks and energy used in the process of liquefying and transporting the LNG.»

The important thing to understand is that essentially all of the climate effects of methane emissions disappear within 20 years of cessation of emissions; in this sense, the climate harm caused by methane leakage is reversible.

Not exact matches

Because they form by leakage of methane into seawater it implies that something at that time caused a large release of methane into the ocean.

Methane leakage at the levels reported by Jackson's team isn't a direct health risk.

Methane lawsuit threat hangs over EPA's head Research by the Environmental Defense Fund has found that leakage rates must remain below 3.2 percent for natural gas power plants to carry a climate advantage over coal plants.

Almost all of the methane leakage calculated from the Texas research «could be affected by this measurement failure,» according to the paper; «their study appears to have systematically underestimated emissions.»

«This expedition was organized on a short notice by the Russian Fund of Fundamental Research and the U.S. National Science Foundation following the discovery of a dramatic increase in the leakage of methane gas from the seabed in the eastern part of the Arctic», said Professor Igor Semiletov, the head of the expedition.

Natural gas produced by hydraulic fracturing, or fracking (a much - touted key to expanding production) is even more climate - disruptive than coal because of methane gas leakage.

Although LNG proponents still characterize shale gas production as «clean» and without methane leakage or groundwater contamination, field observations by the David Suzuki Foundation suggest that many leaky wells are not appearing in the B.C. database.

According to a rough calculation by Stephen Pacala of Princeton University, if all the world's gas producers attained BP's leakage rate of 0.2 %, instead of an industry average of over 2 %, it would prevent 100m tonnes or so of methane from entering the atmosphere every year.

The New York Times and the Wall Street Journal today reported on a new study by the University of Texas that found leakage rates of methane from natural gas fracking operations are lower than previously stated by US EPA.

After accounting for all the methane leakage factors mentioned by the Post, the NETL study clearly demonstrates that life cycle GHG emissions from LNG exports from the U.S. are significantly less than emissions from coal generated electricity in China and in Europe.

Further scientific analysis may reveal that methane leakage rates may be small enough to provide climate change emissions reduction benefits when coal combustion of electricity production is replaced by natural gas combustion.

In conclusion, we have identified strong ethical arguments that support the need to ramp up non-fossil fuel combustion in the United States and other developed countries while implicitly acknowledging that there could be some short - term benefit if coal combustion is replaced by natural gas, a conclusion that only can be reached with better understanding of the methane leakage issues.

Other states can do their part by following Colorado's lead and mitigating methane leakage.

Recent standards from the Environmental Protection Agency (EPA) will substantially reduce leakage from natural gas systems, but to help slow the rate of global warming and improve air quality, further action by states and EPA should directly address fugitive methane from new and existing wells and equipment.

1 ton = ~ 7.3 barrels oil estimated Gulf oil leakage rate ~ 21600 barrels / day (5 - 40,000 depending on who's estimating) or 3000 tons / day methane emission = 1.5 e3 ton / day = 1.5 e9 g / day at 50 % methane by weight in the leak (probably a high estimate) Gulf area = 1.5 e6 km ^ 2 = 1.5 e12 m ^ 2 Gulf average depth = 1.62 e3 m Gulf volume = ~ 2.4 e15 m ^ 3

The analysis was partly based on a methane leakage estimate of 1.5 % of natural gas consumed, a figure assumed by the federal government, methane of course having much more climate impact per gram than CO2.

Tabulate the CO2 exhalation rates over the last 15,000 years from (i) terrestrial and submarine volcanism (including maars, gas vents, geysers and springs) and calc - silicate mineral formation, and (ii) CH4 oxidation to CO2 derived from CH4 exhalation by terrestrial and submarine volcanism, natural hydrocarbon leakage from sediments and sedimentary rocks, methane hydrates, soils, microbiological decay of plant material, arthropods, ruminants and terrestrial methanogenic bacteria to a depth of 4 km.