□ □
[□] □
□? □
The Environmental Protection Agency had teams out taking water samples to check for toxins , and the rumor — apparently unfounded — was that entire districts were so contaminated that they would have to be razed , along with hundreds of thousands of vehicles . The environmental response to such changes may be equally subtle , existing as effects on general ecosystem processes ( e.g . Now Bell Environmental Services has donated a " Bell Strip " to give the pesky pigeons an electric shock when they land on the building , possibly teaching them not to return . The Environmental Protection Agency has determined that there is no safe level of exposure to asbestos . The environmental factors that affect our skin , such as sun , lice , smoking , dandruff , and nail biting , are also covered . </p> <p class="toptext"> The Environmental Emergency Regulations , developed under section 200 of the Canadian Environmental Protection Act ( CEPA ) 1999 came into force on November 18 , 2003 . The Environmental Studies option provides students with an understanding of environmental issues , drawing on scientific and public policy perspectives .