1. Pesticides in Snow Hageman et al. 2006
Snow samples collected at national parks: Sequoia, Rocky, Mount Rainier, Glacier, Denali, Noatak, and Gates of the Arctic
Are pesticides in snow?
Local or regional sources?
Cold-condensation make worse?

2. Pesticides are everywhere!

3. Inverse Latitude Effect

4. Cold Condensation Hypothesis

5. Summary Pesticides were prevalent Sequoia National Park the worst
Historical pesticides still around
No support for cold-condensation Ho
Almost all pesticides local/regional in source, except Arctic areas.