how does a physicist differ from other scientists in terms of giving solution to energy crisis?

Physicists will figure out how to control fusion in another 100 years or so. That would fix things very quickly.

Some physicists are trying to use solar energy to create hydrogen gas which can be used in a new generation of automobiles.

I'd appreciate it if you voted this a 5 star answer rather than leaving it up to an ARBITRARY vote. When you choose a best answer you get back 3 points. You get NO points back if you let it go to a vote.

At the present time, not at all. The solution lies with Congress, which has prohibited oil drilling on millions of acres of the US. This is costing the economy a billion dollars a day -- but no caribou in the ANWR need look at an oil rig.

Physics is the branch of science that deals with energy.