I have the solution, the powers wont like it and wont enforce it either.
There is an engine that runs on sea water patented somewhere buried in the back of the oil companies file cabinet.
If this engine was put into production the melting ice caps would be cancelled out by demand for waterfuel.
Then the residue exhaust would form a mist to protest us from the sun should the ozone layer be in the state that they like to tell us frequently.
Only downside is the beaches would then be mined by the taxman to prevent you nipping down for a free tankfull.
You would then pull on to the forcourt and be confronted with the choice of Unsalted,Ready Salted or Heavy Seawater