Clean Air Handbook by 
Encyclopedia of Environmental Science and Engineering by These titles and more can be found in the Reference Collection on the first floor of Foley Library.
Encyclopedia of Earth Science - REF QE5.K85 2005
Encyclopedia of Environmental Pollution and Cleanup - REF TD173.E53 1999
Environmental Crime: A Sourcebook - REF HV6403.B87 2004
Environmental Encyclopedia - REF GE10.E38 2003
Encyclopedia of Global Change - REF GE149.E445 2002
Environmental Guidebook: A Selective Reference Guide to Environmental Organizations and Entities - REF TD171.S76 2002
Handbook of Environmental Data on Organic Chemicals - REF TD196.O73 V47 2001
New Atlas of Planet Management - REF HC79.E5N46 2005
Water Encyclopedia - REF TD345.W26 2005
World Atlas of Biodiversity: Earth's Living Resources in the 21st Century - REF QH541.15.B56 G76 2002