C) The Earth is at least three billion years old. :)
Besides wildfires, human settlements affect neighboring ecosystems through biotic processes, including exotic species introduction, wildlife subsidization, disease transfer, landcover conversion, fragmentation, and habitat loss.
Answer:
flase
Explanation: photosynthiesis is oxygen and carbon dixocide
Answer:
Global warming.
Explanation:
Because it is an ecological problem that could be studied by modeling more easily than by observation or experimentation, because it occurs over a large area and a long period of time