What would happen to the amount of oxygen in earth’s atmosphere if half the trees on earth were cut down? why?

the ammount of oxygen in earths atmosphere would decrease a lot because trees absorb carbon dioxide from the atmosphere and release oxygen using the process of photosynthesis. Trees produce roughly one third of the oxygen in our atmosphere.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

i believe your answer would be c.. : )