It's a tall order: Over the next few decades, the world will need to wean itself from dependence on fossil fuels and drastically reduce greenhouse gases. Current technology will take us only so far; major breakthroughs are required. What might those breakthroughs be? Here's a look at five technologies that, if successful, could radically change the world energy picture.

Five technologies that could change everything

October 26, 2009

It’s a tall order: Over the next few decades, the world will need to wean itself from dependence on fossil fuels and drastically reduce greenhouse gases. Current technology will take us only so far; major breakthroughs are required. What might those breakthroughs be? Here’s a look at five technologies that, if successful, could radically change the world energy picture.