It's only available in California so far, but it's going well (according to Top Gear). This car offers a big improvement because it doesn't run on a battery. Here in Australia, that would most likely mean we'd be burning brown coal for our electricity, which is not a great improvement (maybe not an improvement at all?) on petroleum. In the UK, they would be using nuclear energy (umm...).
It's an ordinary Honda. But it runs on hydrogen and the only by product is H2O (water).
What struck me is that this will cause a minimum of social disruption: petrol stations will gradually change over to be hydrogen & petrol stations, and apart from that nothing much will change. That reduces buyer resistance. That reduces commercial resistance.
Sometimes human ingenuity just makes me hopeful for the future, instead of afraid.