Sentences with phrase «fossil fuel inputs»

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

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

Cotton has high chemical use and depends on fossil fuel inputs.

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

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.

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

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.

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-.

Biofuel production typically involves substantial fossil fuel inputs.

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

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).

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.

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).

«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.»

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.

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.»

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.

In addition to concerns about feedstock limitations, corn ethanol derives much of its energy from 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.

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.

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.

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

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.

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.

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

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

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.