energy and/or matter can not be destroyed, but can be changed into another form of energy or matter.
the earth is a perpetual boiling pot, re-inventing itself over eons of time.
it matters not whether we burn or bury. the earth and it's atmosphere are both of our dumping grounds.
i'm not sure how much matter is lost in space but it is negligible, after all some alien matter is brought to earth via space.
we as humans will wreak our havoc and then be gone, after which this fertile planet will once again re-invent herself.