Enlarge (credit: Tobias Titz / Getty Images) The world has a lot of plastic—8.3 billion tonnes of the stuff has been produced since 1950. It has so much plastic that humans have started trying to figure out ways to use the vast quantities of plastic waste we’re accumulating. For some, that means recycling; for others, […]
Enlarge / A future green jet fuel? (credit: Picture Alliance/Getty Images) For many applications, liquid fuels remain the most practical energy supply—applications like aircraft and large ships being obvious examples. It’s possible to avoid using fossil fuels for these applications, since there are many ways of producing biofuels. But we can’t produce biofuels at a […]