Bat I can bet may 401K that not even a world running on hydrogen only can satisfy the environmentalist movement ...take my guess increasing water vapors in the atmosphere will cause heavy rains to some and lack off to others the pour in Africa with even less drinkable water... ..they need a reason to exist and no amount of progress is satisfactory, ie clean air reference standards change 18 times in the last 20 years, if were not a large section of EPA had no reason to exist today.