How much oil is left in the world?

Related questions

1. Why Brent price is higher than WTI?
2. Why is Brent and WTI difference?
3. What happens when you run out of oil in your house?
4. What causes gas prices to change?
5. Is Syria an oil rich country?
6. How is oil price determined?
7. Who runs OPEC?
8. Why is the price of oil rising?
9. Why is the price of oil increasing?
10. Why is California gas prices so high?

Tags

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5. #levels
6. #earth
7. #reserves
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17. #prediction
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19. #enough
20. #current
21. #years
22. #cited
23. #heavily
24. #barrels
25. #about