For alternatives to petroleum, the hype has recently been about EVs and almost all auto makers are rolling out their electric vehicles, yet for most American automotive owners they are far from practical considering the miles of highway and distances we travel. For that, efficient clean diesels running biodiesel makes a lot of sense ... here's a NYTimes article offering some positive news on this carbon neutral renewable fuel especially if it is produced from genetically engineered algae.
Algae are attracting attention because the strains can potentially produce 10 or more times more fuel per acre than the corn used to make ethanol or the soybeans used to make biodiesel. Moreover, algae might be grown on arid land and brackish water, so that fuel production would not compete with food production. And algae are voracious consumers of carbon dioxide, potentially helping to keep some of this greenhouse gas from contributing to global warming.