BIOL 350 Lecture Notes - Lecture 26: Biocapacity, Ecological Footprint, Ecosystem Services
Course CodeBIOL 350
ProfessorLonnie William Aarssen
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Where are we headed?
•Occupy all of our thinking: sex, legacy, leisure
◦impending collapse of human civilization from environmental degradation is not on our
How bad is it? Really?
•I = PAT
◦I: impact of humans on the degradation of ecosystem services
◦P: population size (affecting total consumption, waste production, demand for space)
◦A: affluence (consumption per capita)
◦T: allowing affluence, but with negative effects (ex: pollution, climate change)
•Living Planet Report: supply side vs demand side
◦supply: area x bioproductivity = biocapacity
◦demand: population x consumption per person x resource and waste intensity = ecological
▪gap between supply and demand: overshoot
•our footprint in 2005 exceeded the Earth's ability to regenerate by about 30 percent
•by 2030s we would need two Earth;s to keep up with humanity's resource demands and waste
Ecological Footprint by country – 2005
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