Energetic effort
You don’t see many hydrogen fuel-cell vehicles on the streets of Tokyo but that’s about to change. Beginning in March the Tokyo Metropolitan Government will introduce the country’s first buses that run on hydrogen, the most abundant element in the universe. It’s the start of the city’s roll-out of 100 Toyota-made fuel-cell buses in time for the 2020 Olympics. Unlike today’s petrol-powered cars, fuel-cell vehicles don’t spew pollutants: once hydrogen is converted to electricity, all that drips from the exhaust is water. The Japanese government wants to have 40,000 fuel-cell vehicles on the road by 2020, 200,000 by 2025 and 800,000 by 2030. Getting enough of these vehicles on the road to make hydrogen-refuelling stations worthwhile is a major hurdle. But if Tokyo’s bus programme can expand quickly and showcase the benefits of the technology – and car-makers can churn out affordable and attractive models – there might be something to those ambitious government targets.