Human activity has the greatest effect on global climate change when it results in which of the following

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Individuals do not compete directly for resources, but are prey for the same predator

Environmental science are unconsidered with methods to preserve natural resourcesa.trueb.false