Sentences with phrase «fuel inputs»

On the one hand, fossil fuel inputs for growing the biomass will likely be much lower than for corn.

I'd like to have seen a table giving the various energy and fossil fuel inputs for the calculation, if only to see what the biggest inputs are.

When its humid, lots cold / humid air would enter your engine chamber while the existing fuel input is less.

I'm only saying this to note I know the anthropogenic aerosols from this period can't be directly compared to the emission rate per fossil fuel input as later in the 20th century.

There is, in fact, a whole pyramid of fossil fuel inputs to the production of all alternative energy capital equipment.

Cuban leaders responded to the crisis by decentralizing food production, reducing fuel inputs, and encouraging urban gardening.

I think the crux of this question has to do with power output per fuel input at varying engine RPMs.

Reliance on such fossil - fuel inputs not only sustains oil dependency but also represents a major water pollution problem when they run off into rivers.

Other bioenergy fuels such as wood chips, cellulosic ethanol, methanol, sugar cane and biodiesel have their own distinct lifecycle fuel inputs and carbon emissions, raising the thorny issue of assessing and taxing their lifecycle carbon emissions.

Sam It is true that the IPCC models have a range of scenarios for future carbon emissions and concentrations, but ALL of them are badly flawed, and fail to take nto account a number of crucial factors, most notably technological change (leading to greater output for less fuel input, as has been the case so far throughout human history) and the observed slowdown in population growth.

(I should note that, in the case of electricity, externalities associated with fuel inputs, such as coal, are tabulated on lines for those fuels rather than electricity.)

Because wind energy arrays do not require continual fuel inputs, upfront expenditures for turbines, foundations, and electrical infrastructure constitute nearly 75 % of total project costs (WindEurope 2016).

Companion planting rye or switchgrass or some other crop that fixes nitrogen may not demand the fossil fuel inputs assumed.

«CHP systems have always offered a way to do more with a single fuel input, offering a greater «bang for the buck» while simultaneously reducing emissions intensity.

The fossil fuel inputs into ethanol production are also largely non-liquid (natural gas and coal).

Switchgrass production requires fossil fuel inputs for machinery used in establishment (soil preparation and seed sowing), cultivation, harvest, and transportation to the processing plant (Qin et al. 2006).

But for the U.S. primary energy fossil fuel input into the electric power sector in 2010, it seems to be about 0.39933 W / (kg CO2 / yr)(1.4632 W / (kg C / yr)-RRB-.

Many local farmers are smaller - scale (less energy intensive) and use methods that reduce their dependence on excessive fossil fuel inputs and inappropriate tilling methods (farmers love to talk about their farms — ask about their methods if you're concerned).

No chemical / fossil fuel inputs to grow the food for soy or feed the cows for dairy, no packaging, no transport to / from the store, no bottles to manufacture or wash (when not pumping), really no waste at all!

This time, the dominant carbon isotopic values in the new inputs were about -60 ‰, pointing to a microbially driven source rather than fossil fuel inputs.

I believe the FI engines will make use of some feedback sensor * (like o2 sensor, TPS sensor) * to optimise the fuel input.

Currently all alternative energy system construction is subsidized by fossil fuel inputs.

The two scientists calculated all the fuel inputs for ethanol production — from the diesel fuel for the tractor planting the corn, to the fertilizer put in the field, to the energy needed at the processing plant — and found that ethanol is a net energy - loser.

A minimal first step would be to ensure that all fossil fuel inputs to biofuels are carbon - taxed, including natural gas used as feedstock for ammonia - based fertilizers of corn grown for ethanol.

Biofuel production typically involves substantial fossil fuel inputs.

We start with a minimal approach that would tax all fossil fuel inputs of bioenergy including those used to manufacture fertilizer for corn grown for ethanol.

Indeed, the corn - to - ethanol production cycle is so carbon - intensive that a carbon tax applied to its fuel inputs (including natural gas) would internalize much of ethanol's climate cost, obviating somewhat the need for a tax on the end - product.

«PV BEV systems also have the lowest life - cycle GHG emissions throughout the U.S. and the lowest fossil fuel inputs, except in locations that have very high hypothetical switchgrass yields of 16 or more tons per hectare.»

Leave carbon content of biofuels and biomass untaxed, at least for now, while taxing fossil fuel inputs to biofuel production.

Cornell biology professor David Pimentel and U-C Berkeley engineering professor Tad W. Patzek concluded in a detailed analysis that production of leading biofuels uses more fossil fuel inputs than they displace, i.e., that their lifecycle emissions exceed those of fossil fuels.

Note, however, that the substantial fossil fuel inputs to biofuels would be taxed under this option, causing prices of fossil fuel - intensive biofuels to rise in proportion to a carbon tax.

At the same time, fossil fuels have shrunk the human footprint on the natural world by amplifying the food supply per acre of arable land through natural gas — based fertilizers and other fossil fuel inputs.»

Ways to reduce fossil fuel inputs to food systems include the use of farm machinery powered by renewable electricity or farm - produced biofuels; the localization of food systems to reduce transport (perhaps entailing vertical urban agriculture); the adoption of organic and ecological production practices to reduce the need for nitrogen fertilizer, pesticides, and herbicides; and an overall reduction in the consumption of highly processed foods.

The American food system rests on an unstable foundation of massive fossil fuel inputs.

Our agriculture depends on high - yield crop variants supported by large inputs of energy, water and fertiliser, the latter in particular requiring high levels of fossil fuel input.

In the context of Peak Oil, it is not the fossil fuel inputs that matter, but rather the petroleum inputs

After all, as DaveMart says in pushing his pet nuclear, in principle everything could be electrified so that the only fossil fuel inputs are for the hydrogen - but if that's (say) 80 % of the total, and all the trucks and water boiling is the other 20 %, that's a very different outlook than the reverse, for a fossil - fuel - constrained, or CO2 emissions - constrained future.

But if the argument is how much ethanol is really helping - and of course that's exactly what the argument is - then that number is (roughly) 3 % when you correct for the energy content, 2 % when you correct for the liquid fossil fuel inputs, and under 1 % when you correct for total fossil fuel inputs.