There are certain things that Americans expect their government to do. Our infrastructure is vitally important. Putting people back to work with construction is important. Our roads, our bridges, our sewers, our waterways, our dams - this is what makes our country so special.
For example, a breakthrough in better batteries could supplant hydrogen. Better solar cells could replace or win out in this race to the fuel of the future. Those, I see, as the three big competitors: hydrogen, solar cells and then better batteries.