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.

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

Explanation:

within these regions are all the major types of biomes in the world. a biome is a community of animals and plants spreading over an extensive area with a relatively uniform climate. some diverse biomes represented in north america include desert, grassland, tundra, and coral reefs.