Which country holds the world's largest oil reserves?

Related questions

• How do solar energy companies make money?
• What cities have the worst and best air pollution?
• How can natural disasters affect a country's development?
• Why are the citizens of G8 countries responsible for a disproportionate amount of greenhouse gas...
• How much of the world's oil does the region in Southwest Asia hold?
• What fungal disease can lead to a major economic loss in wheat crops?
• Why does globalization lead to increasing environmental damage?
• What is the most likely cause of Brazil's greenhouse gas emissions?
• How much of the world's oil production currently comes from offshore regions?
• Where is most of the world's corn and soy grown?