Sentences with phrase «emission sources before»

The sulphate content of air masses that travelled over industrial emission sources before reaching South African grassland was many times that of air that had travelled over areas with no industrial emissions.

Not exact matches

«Before we had this capability, we could not detect the numerous faint sources that produce much of the background emission,» he added.

According to a report published today in the journal Nature, some of the emissions come from discrete sources representing hundreds of never - before - seen white dwarf stars, neutron stars and black holes.

The amount of indoor emissions found in the current study is «similar to if you had an old light ballast in your house,» Hornbuckle added, referring to a common source of PCBs from before they were banned.

Your report acknowledges that «our energy must come from lower emission sources» if we are to meet the ambitious and essential targets that lie before us.

Among the scientists who testified before this Committee on the issue of climate change in the last Congress, Pat Michaels was the only one to dismiss the need to act on climate change... Dr. Michaels may have provided misleading information about the sources of his funding and his ties to industries opposed to regulation of emissions responsible for climate change.»

Cathy Cash, senior editor, discusses a case before the appeals court, Coalition for Responsible Regulation versus EPA, which consolidates four major challenges to the federal government's ability to tackle greenhouse gas emissions from stationary sources for the first time.

Ruminants, which ferment plants in a specialized stomach before digestion, are estimated to be the largest single human - related source of methane, with greenhouse - gas emissions from sheep and cattle 19 to 48 times higher than beans or grains per pound of food produced, according to the report.

And as said before, the ice cores measurements at one side and the emissions estimates for the period 1900 - 1960 indicates that nature was a net sink over that period, be it that in some years nature might have been a source, in other years a sink.

Clearly, remediating CO2 emission prior to well - mixing (at source, before emission), reduces the initial forcing without becoming a forcing itself.

These are not the factors at work here, and before even looking for a natural source of CO2 you have to say where is mans emissions going, that so closely match the increasing CO2 in the land and oceans.

Again please expain where mans emissions are going that match the increase, it needs to disappear from the carbon cycle before you can point to another source.

I've been following discussions of solar energy on - and - off for quite a while, and it has always seemed as if it would be quite a long time, even assuming an emissions trading scheme or carbon tax, before solar photovoltaics could be a cost - competitive source of electricity without special support such as capital subsidies or feed - in tariffs set above market prices.

Generally, CCS involves capturing carbon dioxide emissions from power plants and other point sources before compressing, transporting and injecting it deep into the earth.

Long - term Cenozoic temperature trends, the warming up to about 50 Myr before present (BP) and subsequent long - term cooling, are likely to be, at least in large part, a result of the changing natural source of atmospheric CO2, which is volcanic emissions that occur mainly at continental margins due to plate tectonics (popularly «continental drift»); tectonic activity also affects the weathering sink for CO2 by exposing fresh rock.

Third, the «increase is due to our emissions» argument is making the fallacious assumption that CO2 sources and sinks were in some perfect «balance» before WE emitted any.

Keeping global warming below 1.5 ºC requires an even more rapid decarbonization that involves phasing out CO2 emissions from industry and energy - related sources before 2050 and reaching net zero emissions for all GHG gases within the next 50 years.

Oil is as expensive and dangerous as ever before, and it's the largest single source of US carbon emissions.