It’s ok to use tissue but you should cut it up into small pieces they will nibble on it a little bit though, And no not really.
Answer:
Ocean and river pollution: it has been solved but the problem is that the machine that filters plastic from the water is making it difficult for Fishermen to catch fishes.
that's the only I can think of that could cause problem
Is methane and propane what you're looking for
False is your answer have a good day :)