SunEdison is on a mission to become one of the biggest energy companies in the world, built entirely on renewables .

It still has a ways to go. The developer has a $9 billion market capitalization. The two biggest oil companies, PetroChina ExxonMobil, are worth $376 billion $342 billion, respectively. Duke Energy, America’s largest utility, has a market cap of $50 billion.

But with a slew of billion-dollar acquisitions of wind solar companies most recently Vivint Solar SunEdison believes it is on the path to rivaling the world’s supermajors.

"We are building the next generation of the biggest energy companies on earth," said Julie Blunden, SunEdison""s chief strategy officer, this week after announcing plans to buy Vivint Solar for $2.2 billion.

In this week’s show, we will discuss SunEdison’s business strategy ask if the company is on a sustainable growth path.

In the second half of the show, we’ll talk about a new report showing renewables outpacing nuclear power, then look at a scientific study of climate records that were shattered in 2014.

This podcast is sponsored by ReneSola, a Tier 1 solar cell module manufacturer with a decade of experience in the cleantech industry.

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