It'd be awesome and a little more realistic, that when you crash for example into a tree or bush and your car starts burning, it also catches fire and if the engine explodes it creates a kind of shock wave and the grass burns a little.
I'm not saying the whole environment should burn down like in Far Cry 3/2 but it would still be nice if this was included in future updates
If enviroment will be able to burn, it will be a disaster. Think that you have crashed in east coast map. And your car started burning, so that every tree around you will start burning and it will cause lag.