Alternative fuels?

[Blaze-Senpai]

Once they find a combination of chemicals that can absorb enough of the suns energy, we'll be set.

[TheExAm]

I'd think the best option hydrogen thing (I forgot it's exact name), since it involves combining water and oxygen and the reaction would power the car. I know it's a terrible explanation, but it's something like that.

I believe the process you're referring to is Electrolysis, and from what I know, there's no way to make a self-conained electrolytic system that powers a car on its own. So far, the only way is to do the electrolysis elsewhere at a dedicated facility, and pump the hydrogen to holding tanks, where it's pumped into vehicles. Currently, even this method doesn't give the car a lot of range, since a hydrogen tank big enough to match the range of current gas powered cars would be far too large, and inherently unsafe. Or, so I've read.