I do not have a reference for this, as I heard it on the radio, while driving.
For years, cleaner burning fuels for automobiles have been investigated.
Hydrogen is the ideal fuel. Two small problems are cost and safe storage of the compressed gas.
Someone has developed a "plastic" that absorbs many times it's volume in H2, thus making for a safer fuel tank, in the event of a collision.
An alternative use for such a "plastic" might be interesting ?
Or maybe not.
Sorry I can not give more info. It was one of those quick little stories on the news, with no details.
On an unrelated note:
Some years ago, a small but deep lake in Africa belched up a volume of nasty gas, killing native villagers in the area.
Scientist were called in and concluded that warming of the upper layer of water allowed gas trapped in the colder deep layers to escape suddenly.
And:
A research ship in the Pacific spotted bubbles raising from the ocean and sailed over to investigate.
Their ship almost sank, as they entered the bubbles. After doing a quick U-turn, they checked things out from a safer distance. The conclusion was methane gas, if I remember right.
The volume and frequency of these natural releases can only be guessed at, but may well dwarf mankinds efforts to pollute the planet.
And yes:
I watch entirely too much TV
Maybe someone with better research skills can find something on this H2 absorbing "plastic" ?