Sentences with phrase «carbon debt»

We have run out of carbon budget, and are in substantial carbon debt.

At a time when we have run out of carbon budget and run up carbon debt for avoiding climate catastrophe, the oil production in this country has shot up.

Any further carbon expenditure goes toward increasing carbon debt.

Where did you get your info on carbon debt?

As a renewable source of energy, biofuels have suffered ongoing criticism for their hefty carbon debt.

Nor does it consider ocean carbon stores — which may provide their own carbon debt spiral.

To stay within the temperature target / ceiling of ~ 1 C that leading climate scientists recommend, we have run out of carbon budget, and have accumulated significant carbon debt.

It means we have not only run out of carbon budget, but we have accumulated substantial carbon debt.

However, Khor claims that the rich countries have a historic carbon debt of 568 gigatons, so actually they have a negative carbon dioxide budget of 448 gigatons.

More precisely, atmospheric CO2 rises as long as NPP [net primary production] remains below the initial carbon debt incurred each year plus the fluxes of carbon from biomass and soils to the atmosphere.»

«Growth in wood supply causes steady growth in atmospheric CO2 because more CO2 is added to the atmosphere every year in initial carbon debt than is paid back by regrowth, worsening global warming and climate change.

Even planting crops on abandoned fields, like CRP land, can create a sizable carbon debt if soil is tilled, which releases CO2.

«[P] rojected growth in wood harvest for bioenergy would increase atmospheric CO2 for at least a century because new carbon debt continuously exceeds NPP.»

«If bioenergy crops displace forest or grassland, the carbon released from soild and vegetation, plus lost future sequestration, generates carbon debt, which counts against the carbon the crops absorb.»

Still, those scenarios would fall under the 30 - to 50 - year carbon debt window that worries some conservationists.

If we want to avoid the Apocalypse, the message we need to get out is the following: 1) we are out of carbon budget, and into carbon debt; 2) we need to eliminate all non-essential uses of fossil energy, and make the essential uses more efficient.

While there is no easy answer — it depends on the type of land converted and the productivity of the crop — the study did find that in general soy had the shortest carbon debt, though still decades - long, while palm oil grown on peatland had the longest on average.

S2) that if the smallest area and carbon debt from LUC are given priority, then oil palm would be the best feedstock for biodiesel by far.

It means that we have not only run out of carbon budget, but have accumulated substantial carbon debt.

The qualitative result that growth in bioenergy raises atmospheric CO2 does not depend on the parameters: as long as bioenergy generates an initial carbon debt, increasing harvests mean more is «borrowed» every year than is paid back.

If we widen our view to this century and last century, an argument could be made that the developed world has already spent its fair share of the carbon budget — that it's in carbon debt, as it were.

The researchers found that no - till management in combination corn - soybean fields and corn - only fields created a carbon debt lasting 29 and 40 years, respectively.

Growing cellulosic feedstocks, however, neutralizes the carbon debt, said lead author Ilya Gelfand, a researcher at Michigan State University's Kellogg Biological Station.

«It takes decades to centuries to repay the carbon debt that is created from clearing land.»

And converting jungles to palm plantations or tropical rainforest to soy fields would take centuries to pay back their carbon debts.

«I know when I look at a tree that half the dry weight of it is carbon,» says ecologist David Tilman of the University of Minnesota, coauthor of the other study which examined the «carbon debt» embedded in any biofuel.

And it would take centuries for us to pay off that carbon debt.

This has introduced dubious concepts, such as repaying «carbon debt» through «negative emissions» to offset delayed mitigation — in theory,» Geden wrote in a commentary published yesterday in the journal Nature.

«Negative emissions «simply work like a «carbon debt» mechanism, but it's somewhat dubious to count on «payback» starting in 2050.

The engineer says that the photovoltaics will «avoid the pollution of 175 Tonnes of CO2 per year» so that carbon debt is paid off fast, but it still matters.

I could go on, but the main point is simple: The CIRS building uses every trick in the book to go beyond carbon neutrality, and starts its useful life with half of the carbon debt of most buildings.

There is little information available about what the building is made of, and no accounting of the carbon footprint of its materials and construction, so it is hard to really determine at what point this «zero carbon» building overcomes the carbon debt of its construction, but I suspect it will be a while.

This means that the carbon debt incurred by building the structure has a relatively brief period of utility, before the structure is demolished and another structure built, incurring additional carbon debt.

It owes a carbon debt to countries suffering from climate change that have not done nearly the amount of polluting that the US has over the years.

They talked about the «carbon debt» they were owed by the industrialized world.

Enter an important industry of the future: the carbon debt collector.

Burning wood instead of coal therefore creates a carbon debt — an immediate increase in atmospheric CO2 compared to fossil energy — that can be repaid over time only as — and if — NPP [net primary production] rises above the flux of carbon from biomass and soils to the atmosphere on the harvested lands.»

The last year has seen a massive uptick — under the signs of «carbon debt» and «historical responsibility» and even, in rhetorically extreme cases, «reparations» — in the amount of attention being paid to the problem of inequality between nations, in the context of the global climate policy debate.

If the carbon debt of 568 tons were to be valued at $ 40 per ton, the total owed to the poor countries would amount of $ 23 trillion dollars, implying climate debt payments of about $ 600 billion per year over the next 40 years.

This large «carbon debt», and the related debt of energy, must be paid off if they are to cut emissions over their lifetime.

Eventually, the new forest grows faster and the carbon it absorbs, plus the reduction in fossil fuels, can pay back the «carbon debt», but that takes decades to centuries, depending on the forest type and use.