Announcement: Essay 3 is due in 2 weeks. All exam 2 grades should be up on Moodle
by the end of this week.
Human Impacts: 3 focal topics
• (1) Deforestation
o What are the consequences?
Landslides and flooding
Local weather extremes
• Ex) Atlanta Heat-Island effect
• Ex) Manaus Heat-Island effect
• Both cities have been growing very rapidly, very hot
• Lack of trees in an area can make it very dry / hot
Lost source of medicine and food
• Rosy Periwinkle (a flower)
o Helps treat childhood leukemia
o Rosy periwinkle found in forests of mountain
o Few forests left
• Who know how many cures of cancer we have lost as a
result of removing forests?
Loss of “carbon sink”