The size of the energy market.
Valued at around $7 trillion globally, energy is the most valuable market segment on earth. Delivery of usable forms of energy to the world's 7 billion people is responsible for 10% of the world's annual gross domestic product. A look at the 10 worldwide companies that earn the highest annual revenues reveals that nine of them operate in the energy industry. Because energy generates more revenues than any other industry, it is a prime place to stash your investment dollars.
To meet rising energy demands, the world must invest $37 trillion in related production and supply infrastructure over the next two decades. More than half of that total $19 trillion-will be required by the oil and gas sector for exploration, transportation, and production increases. The remainder will go toward the electricity sector, with $17 trillion slated to be invested in upgraded...