Coskata Inc. Unveils Semi-Commercial Feedstock Flexible Ethanol Facility in Madison, PA

Facility Represents Successful Scale-up of Company`s Technology and Showcase for
the World`s First Commercially-Viable Flex Ethanol Process
MADISON, Pa.--(Business Wire)--
Coskata Inc., a leading developer of next generation biofuels, today announced
the successful start-up of their semi-commercial flex ethanol facility located
in Madison, PA. The accomplishment represents the successful scale-up of the
company`s technology, and will serve as a showcase for the world`s first
commercially-viable flex ethanol process.

"We are proud that we have successfully scaled our technology to this
significant level," said Bill Roe, president and CEO of Coskata. "This facility
is demonstrating that our efficient, affordable and flexible conversion
technology is ready for commercialization. The next step is to build full-scale
facilities and begin licensing our technology to project developers, project
financiers and strategic partners."

Unlike other technologies and facilities that may rely on one primary source of
feedstock, Coskata`s flex ethanol facility will be producing ethanol from
numerous feedstocks, including wood biomass, agricultural waste, sustainable
energy crops, and construction waste. This flexible approach at the Madison
facility is enabled by Westinghouse Plasma Corporation (WPC), a wholly owned
subsidiary of Alter NRG, and their plasma gasification technology. The feedstock
flexible nature of the Coskata approach also allows for true geographic
flexibility, meaning facilities can be built anywhere a feedstock can be sourced
or delivered.

Coskata`s technology, as demonstrated through Project Lighthouse, will be able
to reduce greenhouse gasses by as much as 96% over conventional gasoline, while
using less than half the water that it takes to get a gallon of gasoline. In
addition, the company`s ability to produce non grain-based ethanol that is as
much as 7 times as energy positive as the fossil fuel used in the process,
addresses many concerns related to traditional processes, including energy
efficiency and the use of grain.

"The integrated biorefinery - utilizing Westinghouse Plasma Gasification on the
front end and Coskata`s syngas-to-biofuels conversion process on the back end -
serves as an excellent example of two leading companies working together to
deliver a viable process to the biofuel market," said Mark Montemurro, President
and CEO of Alter NRG. "We`re excited to be delivering the feedstock flexibility
to Coskata`s efficient and affordable process."

The facility is a demonstration of "minimum scale engineering," an industry
standard term which means it is the smallest size that will still allow the
company to scale directly to 50 million and 100 million gallon Coskata
facilities. Some of the ethanol that is being produced at the facility has been
delivered to the General Motors Milford Proving Grounds for early testing, as
well as to another major strategic partner.

"We invested in Coskata so that we could enable the rapid deployment of
commercially viable and environmentally sustainable ethanol globally," said Bob
Babik, GM Vehicle Emissions Director. "We`re proud to say that we have already
accepted some of Coskata`s ethanol at our Milford facility."

Globally, General Motors has produced more than 5 million flex-fuel vehicles to
date. In the U.S. alone, there are more than 3.5 million GM flex-fuel cars and
trucks on the road. For the 2010 model year, 17 E85-capable flex-fuel vehicles
from the Chevrolet, Cadillac, Buick and GMC brands.

GM is on track to make more than half of its vehicle production flex-fuel
capable by 2012.

Coskata leverages proprietary microorganisms and efficient bioreactor designs in
a unique three-step conversion process that can turn virtually any carbon-based
feedstock into ethanol, from anywhere in the world. Coskata`s biological
fermentation technology is ethanol-specific and enzyme independent, contributing
to high energy conversion rates and ethanol yields. Additionally, the process
requires no additional chemicals or pre-treatments, serving to streamline
operational costs. In fact, the company has one of the lowest production costs
in the industry, allowing them to directly compete with gasoline without
long-term government subsidies.

About Coskata

Coskata is a biology-based renewable energy company that is commercializing
technology to produce biofuels from a wide variety of feedstocks. Using
proprietary microorganisms and transformative bioreactor designs, the company
will produce ethanol that can be cost competitive with gasoline unsubsidized
almost anywhere in the world, from a wide variety of feedstocks. Coskata has
compiled a strong IP portfolio of patents, trade secrets and know-how and
assembled a first-class team for the development and commercialization of its
compelling syngas-to-ethanol process technology. For more information, please
visit www.coskata.com.

About GM

General Motors Company, one of the world's largest automakers, traces its roots
back to 1908. With its global headquarters in Detroit, GM employs 235,000 people
in every major region of the world and does business in some 140 countries. GM
and its strategic partners produce cars and trucks in 34 countries, General
Motors Company acquired operations from General Motors Corporation on July 10,
2009, and references to prior periods in this and other press materials refer to
operations of the old General Motors Corporation.

About ALTER NRG

Alter NRG is pursuing alternative energy solutions to meet the growing demand
for environmentally responsible energy in world markets. The Company`s vision is
to be a senior energy producer by becoming the world`s leading supplier of
plasma gasification technology and developing environmentally sustainable and
economically viable gasification projects. The Company`s objective is to further
commercialize the Westinghouse Plasma technology, a wholly owned subsidiary, to
provide renewable and clean energy solutions from a wide variety of feedstocks,
and providing a wide variety of energy outputs - including hydrogen, liquid
fuels like diesel, and ethanol, power, and syngas.

Dig Communications
Matt Hargarten, 312-377-4136
coskata@digcommunications.com
or
Allie Cowan, 312-377-4129
coskata@digcommunications.com
or
General Motors
Kelly Wysocki, 313-378-6640
kelly.wysocki@gm.com

Copyright Business Wire 2009