Question: why are crude oil reserve estimates somewhat unreliable.
answers:
1.all reserve estimates involve uncertainty due to the interpretation of geologic 2.some countries falsify data for political reasons.
3.the original estimates are almost low and tend to grow with time.
4.all the above.

The answer is "All reserve estimates involve uncertainty due to the interpretation of geologic data."

1.All reserve estimates involve uncertainty due to the interpretation of geologic data.

Explanation:

Oil is a valuable resource and original estimates are somewhat is unreliable as the uncertainties involved in the interpretation of geologic time period of the earth the original tends growth of the resources with time changes. As this resource is found at greater depths in the earth layers. Hence there exists changes in the occurrences of these reserves.

Answer erosion,oil spills,pollution,tourism,urban development;

A