However, industrial and agricultural wastes flow into the reservoirs.

Another example is the use of both urban and agricultural wastes to produce methane gas under controlled fermentation.

This seems to be the earliest developments in generating biogas from agricultural waste.

Wood is generally used for cooking purposes and agricultural waste are also used.

There is a new process that can make cellulosic ethanol economically from agricultural waste and even old newspapers.

Biochar made from agricultural waste can substitute for wood charcoal.

Consequently the river is seriously polluted, especially from agricultural waste and pesticides.

That means much more agricultural waste, because it takes 10 or 20 pounds of plants to produce one pound of meat.

The official noted that technology will eventually make it possible to move toward renewable fuel sources, like agricultural waste.

I feel biogases ought to be supplied mainly by agricultural waste.