Innovation: Air Liquide Turns Trash into Energy with BIOGAZ by MEDAL


Organic waste buried in landfills degrades into biogases, which comprise methane, the major constituent of
natural gas. When released in the atmosphere, methane contributes to the greenhouse effect.

Air Liquide launches an innovation: with BIOGAZ from MEDAL, the membrane division of Air Liquide
Advanced Technologies U.S. LLC, methane gas naturally released from landfills can now be captured and
recycled into pipeline quality energy.

In the summer of 2006, a BIOGAZ system was installed at a new landfill methane recovery project near
Johnstown, Pennsylvania. Said Harry Crouse, Chairman of Keystone Renewable Energy, LLC: "We are so
pleased with the performance of the BIOGAZ system that we have already ordered two more units for
projects in Western Pennsylvania. MEDAL's BIOGAZ technology has given us a way to capture and
recycle energy in an economical and environmentally friendly way that would have otherwise gone to
waste or been burned in the landfill's flare." The additional Keystone installations are scheduled for completion
late in the summer of 2007.

Each BIOGAZ system is capable of removing and reprocessing 40,000-160,000 m3 of landfill gases per day.
The ultimate benefit of the BIOGAZ system is that it captures a previously wasted energy stream and
recycles it into high quality energy while contributing to reduce harmful greenhouse gases from landfills. The
recycled methane can then be delivered directly into the pipeline grid.

Air Liquide Group Executive Vice-President Pierre Dufour stated: "The BIOGAZ system developed by our
teams in the United States is not only a valuable offering for customers, but also meets a fundamental
need to use technology to benefit the environment. This patented innovation is also an example of Air
Liquide's ability to develop solution-oriented innovations consistent with the Group's commitment to
sustainable development."

Air Liquide's R&D and Advanced Technologies activities are carried out through a network of 1,400 employees from 25
different countries, located in 18 centers in Europe, North America and Japan. MEDAL is a division of Air Liquide Advanced
Technologies U.S. LLC at the forefront of membrane technology for a host of industrial and environmental applications.

Present in 72 countries, Air Liquide is a world leader in industrial and medical gases and related services. The Group offers
innovative solutions based on constantly enhanced technologies. These solutions, which are consistent with Air Liquide's
commitment to sustainable development, help to protect life and enable our customers to manufacture many indispensable
everyday products. Founded in 1902, Air Liquide has more than 36,000 employees. The Group has successfully developed a
long-term relationship with its shareholders built on trust and transparency and guided by the principles of corporate
governance. Since the publication of its first consolidated financial statements in 1971, Air Liquide has posted strong and
steady earnings growth. Revenues in 2006 totalled 10,949 million euros, with sales outside France accounting for almost
80%. Air Liquide is listed on the Paris stock exchange and is a component of the CAC 40 and Eurostoxx 50 indices (ISIN code
FR 0000120073).

Air Liquide USA LLC Corporate Communications
Diane Labelle (1) 713-624-8082
Michael Rosen (1) 713-624-8023

Group Corporate Communications
Dominique Maire (33)(0)1 40 62 53 56
Corinne Estrade (33) (0)1 40 62 51 31

www.airliquide.com

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