A mod of changes to basic petrochem, which will be shared between a number of other (yet to be finished) mods.

Removes solid fuel from petroleum gas, replacing it with solid fuel from crude oil and a "Gas combustion" recipe, which converts petroleum gas into water (and isn't available in space). Also, it makes all the Solid Fuel recipes available in Biochambers if you have Space Age.

Now also provides ways to make petroleum gas directly from coal or wood, and ways to turn lighter petrol products into heavier products.

The reasons for doing this aren't apparent without the mods that will depend on this one, but I suppose there's nothing stopping anyone from playing with just this mod if they wish.