Many fuels produce pollutants, such as greenhouse gases or waste, when used. which type of fuel produces the least amount of pollutants? a) fossil fuels b) nuclear c) solar d) wood

American scientist, linus pauling, was one of many scientists racing to discover the molecular structure of dna. pauling initially thought that the molecule was a triple helix. later, james watson and francis crick unveiled their double helix model, which turned out to be an accurate description of the molecule's shape. why did watson and crick succeed when pauling failed?