Danish scientists have developed a method that could fine tune the process of using catalysts to remove sulphur from fossil fuels, while German scientists have harnessed nanotechnology that could rebuild the ozone layer. Scientists from the University of Ulm in Germany stumbled across a process that could help eliminate ozone damaging chemicals from the atmosphere, reports nanotechweb.org. Whilst experimenting with nanospheres and perfluorodecalin - a liquid used to produce synthetic blood