Carbon offsets, silicon-wafer batteries, Porsche Turbo S plug-in: Today’s Car News

Audi Q4 e-tron conceptPorsche rolls out one very fast plug-in SUV, just after it outlined a carbon-offset program. Could more moss clean city air? And are silicon-wafer batteries a good idea? All this and more on Green Car Reports. The 2020 Porsche Cayenne Turbo S E-Hybrid is the quickest, fastest SUV ever presented from the performance brand. Perhaps it wasn’t...