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The Earth Institute gratefully acknowledges the generous support it has received from the following:

Merck & Co., Inc. is a global research-driven pharmaceutical products and services company. Merck discovers, develops, manufactures, and markets a broad range of innovative products to improve human and animal health, directly and through its joint ventures.

NOVA explores the relationship between people and the planet on "World in the Balance," a two-hour Earth Day special, airing Tuesday, April 20, 2004 at 8:00pm et/pt on PBS (check local listings).

Click HERE to visit the PBS web site for "World in the Balance."

...products, services and technologies are used by almost 1 million customers in 40 countries.

A Fortune 500 company and the largest industrial gases supplier in North and South America, Praxair is rapidly growing in Asia, and has strong, well-established businesses in Southern Europe.

Praxair's primary products are oxygen, nitrogen, argon, helium, hydrogen, electronics gases and a wide range of specialty gases. All together, Praxair serves approximately 25 industry segments as diverse as healthcare and steel making; computer-chip manufacture and beverage carbonation; fiber-optics and petroleum refining; and aerospace, chemicals and water treatment.