WebMD provides a pictorial overview of rheumatoid arthritis (RA). Learn about the signs and symptoms of RA, how it is diagnosed, and the latest conventional and alternative treatments for this chronic condition.
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Biomass natural gas - an alternative to electricity Biomass is natural plant material consisting of vegitation and animal based materials. It can be converted into gas by heating at very high temperatures with steam and with allowing it to combust. The gas produced from this process is called