Justin Harlow discusses investing in the energy sector in emerging markets. He is the founder and managing partner of Tau Energy Partners, an energy investment advisory firm dedicated to emerging markets.

Angela Maria Kelley, of the Center for American Progress, talks frankly about the difficult practical and ethical questions surrounding U.S. immigration, and the inconsistent approaches in different states because of the deadlock at the federal level.

In a wide-ranging conversation, former U.S. ambassador Donna Hrinak discusses her regional responsibilities in Latin America, and her global work with other food and beverage companies, together with NGOs, to make packaged foods and drinks healthier.

As he retools Lipman, a New York advertising agency, Michael Mendenhall discusses a new approach to branding. He also talks about how companies' ethics are on display in an era of increased transparency, and how they can turn transparency into a business advantage.

Is the U.S. no longer the center of the economic universe? Credit expert Ann Rutledge discusses the recent credit rating downgrade of the U.S. economy and tackles the deeper underlying economic and moral issues, such as attitudes towards risk.

David Aylward specializes in a new sector called mobile health, which uses cell phone and other communications technology to connect poor patients in developing nations to high-level health care. He is working to educate corporations about the opportunities in these markets.

What brought down the Celtic Tiger and will it rise again? Barry O'Leary, head of IDA Ireland (Industrial Development Agency), explains how and why Ireland went from boom to bust, and how foreign direct investment can play a role in its recovery.

Ashok Vasudevan has what it takes to build commercially viable and socially responsible global companies. Tasty Bite, an all-natural, ready-to-eat food sold in the U.S. and Australia, is ranked one of India's "Top-100 Best Companies to Work For."

Architect and sustainability expert Leigh Stringer is convinced that LEED green buildings are only a piece of the puzzle when designing a sustainable office. She argues that a crucial component is human behavior.

Is Bernie Madoff a monster or is it easier than you might think to slip over the line? Diana B. Henriques explores the ethical questions raised by Madoff's financial house of cards, which collapsed in late 2008.