Solar thermal fuels convert light to heat -- someday . . .

As a matter of interest. HOW Gasoline or diesel fuel is made...

Sun shines on plants. they capture CO2 out of the air and contain it using the power of the sun to fuel the conversion. Eventually they die and decompose into oil. We drill . bring the oil up. "Crack" it into Gasoline, Diesel fuel and other stuff. then burn it releasing the CO and CO2 back into the atmosphere where trees. Grass and flowers .. Using the power of the sun. Again "Trap" the carbon.

SO what you are burning now is solar fuel.