Duke Energy and ENN Group Collaborate on Green Cities Initiative

WASHINGTON, January 19, 2011 - Duke Energy and China-based ENN Group announced an agreement today to
collaborate on the development of technologies to help build greener cities
in China and the United States.

The agreement creates the Future Energy Technology Demonstration
Platform and paves the way to exchange knowledge on advanced energy, building
and transportation technologies.

ENN is committed to the development and use of clean energy and is
constructing China's first smart energy "eco-city" in Langfang, China,
close to Beijing.

Duke will collaborate with ENN to develop the eco city and will adapt
what is learned from the eco city development as it deploys clean energy
technologies.

The agreement was signed by Duke Energy Chairman, President and Chief
Executive Officer Jim Rogers and ENN Chairman Wang Yusuo. Chinese officials
and representatives from the U.S. Department of State and Department of
Energy attended the signing, which coincides with the diplomatic visit by
Chinese President Hu Jintao to the United States.

The companies' shared vision for a "green" city encompasses electricity
produced via cleaner generation technologies, energy storage, energy
efficiency, energy recovery (for example, carbon absorption by microalgae),
and electric vehicle infrastructure.

"Today's agreement exemplifies what's possible when the U.S. and China
collaborate on energy technologies for the 21st century," said Rogers.
"Together we seek to demonstrate how these next-generation technologies can
transform the way we live."

"This collaboration is not only a stepping stone for cleaner energy in
China and the U.S.," said Chairman Wang. "ENN Group and Duke Energy's
cooperation will lead to the development of new, cleaner ways to produce,
store, distribute and use energy for the benefit of the world."

This collaboration follows an agreement by Duke Energy and ENN to
accelerate the development of low-carbon and clean energy technologies
announced Sept. 23, 2009, at the Clinton Global Initiative in New York. The
companies are also working on jointly developing commercial solar power
projects in the U.S., pursuant to an agreement signed Oct. 23, 2009.

About Duke Energy

Duke Energy is the third largest electric power holding company
in the United States, based on kilowatt-hour sales. Its regulated utility
operations serve approximately 4 million customers located in five states –
North Carolina, South Carolina, Indiana, Ohio and Kentucky — representing a
population of approximately 11 million people. Duke Energy's commercial power
and international business segments operate diverse power generation assets
in North America and Latin America, including a growing portfolio of
renewable energy assets in the United States.

Headquartered in Charlotte, N.C., Duke Energy is a Fortune 500
company traded on the New York Stock Exchange under the symbol DUK. More
information about the company is available on the Internet at:
www.duke-energy.com.

About ENN

ENN is pioneering innovative technologies that provide clean
energy solutions for the world. It's the largest private clean energy
solutions provider company in China. Since its founding 21 years ago, ENN has
grown into an integrated group of companies that delivers clean energy to
tens of millions of customers and provides overall clean energy solutions to
city governments and heavy industry. ENN has more than 100 subsidiaries in
over 100 cities across China and around the world, and employs more than
26,000 people. Additional information about ENN is available on the Internet
at: www.enn.cn.

At Duke Energy, Dave Scanzoni, +1-704-382-2543, or 24-hr, +1-800-559-3853; or at ENN Group, Lisa Wang, +86-316-259-9733, or wangfanga at enn.cn