" Chemists have used microwaves to convert plastic bags, milk bottles and other supermarket packaging into a clean source of hydrogen.Plastic waste can already be converted to hydrogen using other methods, and commercial facilities are being developed to transform the plastic. However, a new approach holds the promise of being quicker and less energy-intensive.Peter Edwards at the University of Oxford says he and his colleagues wanted to “confront the grim reality” of plastic waste, with the UK alone producing 1.5 million tonnes each year. As the density of hydrogen in plastic bags is about 14 per cent by weight, plastic offers a possible new source for countries eyeing cleanly produced hydrogen to tackle climate change. Most existing approaches involve first using very high temperatures of more than 750°C to decompose plastic into syngas, a mixture of hydrogen and carbon monoxide, and then using a second step to separate out the hydrogen. "
