Most hydrogen is employed near its production site, with the two largest uses being fossil fuel processing (e.g., hydrocracking) and ammonia production, mostly for the fertilizer market.
Such exposure can originate from gasoline and diesel combustion, fossil fuel processing, road paving, roofing, and tobacco smoking.
PAHs can be derived from incomplete combustion or fossil fuel processing, and the highest concentrations in the environment are found in urban areas [ 1].
According to the study, the most cost-effective energy cap policy would be to combine a cap on "downstream" fossil fuel use (processing and consumption by manufacturers and consumers) with a national energy saving allowance trading system among provinces.
While the shift to ethanol cooking fuel will release less CO2 comparatively, the conversion of 400,000 ha of forest to cassava farm, the use of fossil fuel for processing cassava tubers to ethanol, fermentation of cassava starch and the use of agro-chemicals will release CO2 as well.
The national power grid is currently dominated by synchronous generators, processing fossil fuels.
