Match the correct energy type to the description below: coal natural gas, nuclear, oil (petroleum). Each term will be used once.

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

Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?

If animal agriculture was eliminated, how much grain would become available for human consumption?