Around the world, governments are turning to alternative fuels to cut emissions and improve energy security. India has emerged as one of the fastest movers, rolling out E20 gasoline years ahead of schedule. The shift helps curb oil imports and absorb surplus sugarcane production - but has also triggered concerns over reduced fuel economy, vehicle compatibility and limited consumer choice. Comparing India's rapid transition with Brazil's gradual approach, REV explores the benefits, trade-offs and unanswered questions surrounding ethanol's future role in India's transport system. Plus: a political cartoonist in Tanzania builds his own EV, an artist in Mali turning buses into moving canvases, and parcel delivery via the Madrid metro.