More than 14,000 oil-and-gas companies were active in the United States in 2009. But multinational giants like Exxon Mobil and BP now produce much of the nation's gas.
After a college invited ExxonMobil's CEO to do a commencement address, outraged students instead invited Richard Heinberg. Here's what he had to say about life after oil.
A handful of companies are at a financial disadvantage because of their exposure to waste water remediation liabilities. Others, like Chevron, will remain relatively unaffected.