Most of what we know about "habitability" -- the ability of an environment to host and support life -- has been studied under the very different conditions on Earth.

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"The work environment provides a host of potential partners, " researcher Adrian J.

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But the multi-billion-dollar effort is straining the host city's resources, environment and nerves.

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There are a host of chemicals found in the typical office environment that may cause long-term health issues.

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