Duke Energy recently announced a memorandum of understanding with the China Huaneng Group, China's largest power generator, and the ENN Group, one of the nation's largest private energy companies.

CNN: Coal-burning CEO: U.S., China must fight pollution

By purchasing a proven revenue generator, Marathon Patent Group is pursuing an unusually diversified business model versus a typical IP company.

FORBES: New IP Company Marathon Patent Group Promises Diversification Amid Risky Environment

Rayons paved the way for his entry into Ballarpur, then the group's biggest cash generator.

FORBES: Magazine Article

The credit-card business has been an important revenue generator for Sears, representing about three-fifths of the group's operating income.

ECONOMIST: Moving on | The

In other solar news, the Westmill Solar Cooperative launched the world's largest community-owned solar project in the UK, a group of African teenagers developed a pee-powered energy generator and Tunisian company Saphon Energy unveiled a new bladeless, bird-friendly wind turbine.

ENGADGET: Inhabitat's Week in Green: Dyson Spheres, bladeless wind turbines and airless bike tires