Has global warming quadrupled wildfire risk?

Climate-related events like hurricanes and wildfires caused $100 billion in economic damage last year, and rising sea levels and flood surges pose a $1 trillion-a-year risk to coastal cities like New York, Miami and New Orleans, technologist and author Ramez Naam tells  The Daily Ticker.

Naam says droughts brought on by global warming have quadrupled the frequency of wildfires in the U.S. He advocates more investment in alternative energy sources. Source: finance.yahoo.com.