Google has invested billions of dollars in clean energy projects and startups, most recently throwing down $3.2 billion for the intelligent thermostat maker Nest.

Is the internet giant positioning itself to be the next energy giant? Or is the company's goal less ambitious? In this week's show, we'll look at Google's cleantech investment strategy and ask what the endgame may be.

Then, we'll examine the recent rise U.S. CO2 emissions and discuss whether the global coal industry is approaching a peak.

The Energy Gang is produced by The show features weekly discussion between energy futurist Jigar Shah, energy policy expert Katherine Hamilton and Greentech Editor Stephen Lacey.