The Canadian Human Rights Commission
Policy on Environmental Sensitivities
A PDF of the policy (which I copied here when I saw it had disappeared) is now available to download from the Canadian Human Rights Commission website, having been reviewed in January of 2014. (It’s not available as a web page).
The PDF also includes new links to the 2007 documents “The Medical Perspective on Environmental Sensitivities” and “Accommodation for Environmental Sensitivities: Legal Perspective”.