ALTERNATIVE FUELS
These are non-conventional and advanced fuels,materials or substances that can be used as fuels.the term alternative is used to contrast with fossil fuels according to some source.by most definitions alternative energy doesn't harm the environment,a distinction which separates it from renewable energy which may not have significant environmental impact.
RENEWABLE ENERGY SOURCE
The earth has abundant renewable energy resources,researchers and other partners are working to deliver innovative technologies that will make renewable electricity generation cost competitive with traditional source of energy.they are naturally replenished on a human timescale often referred to clean energy.
EMERGING FUELS
Emerging fuels technology focused on the development and implementation of methods for producing synthetic/renewable-fuel and chemicals from a variety of carbonaceous feed stocks such as municipal solid.more research is needed to characterize the impacts of these fuels,such as human health impacts,greenhouse gas emissions.
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