Great creations [alternative energy]

This paper presents eight articles that feature alternative energy sources that aim to provide a cheaper source of electricity. These are the solar tower, the desulfitobacterium which can convert food sources into electricity, the small sealed transportable autonomous reactor (SSTAR), ultraclean coal, fusion power, printable solar cells, a paper battery that generates electricity from urine, and a vertical axis wind turbine. delete all (better to use the general term than enumerate each one)! add: renewable energy sources, direct energy conversion, environmental factors, electric power generation.