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BIOL 350 (177)
Lecture

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Department
Biology
Course
BIOL 350
Professor
Lonnie William Aarssen
Semester
Fall

Description
Soil lossthe inevitable failure of modern agriculturestable healthy soil natural vegetationnatural regeneration and recyclingsoilagriculture crop one species and nothing elsefertilizers ammonia based petrochemical produced pesticides irrigation results in degraded soil volume loss nutrient loss polluted water lost biodiversitytop soil and nutrient loss to erosionnutrient loss in harvested cropsall would be impossible wout oilArable land is disappearing wind water erosionreport from 2008 peak soilsoil degradation is especially high in dry lands due to salination from irrigationfertilizer use more than doubled in the last 30 yrsAfrica Middle East and Asia are at highest risk for soil degradation but North America and Europe have the highest pesticide usePollution7 million premature deaths annually linked to air pollutionstruggle between economy health and environmentsources of air pollutants 52 industry 27 transportationThreats from above study commissioned by US govmt Air pollution groundlevel ozone high levels of deposited mercury acid rain excess nitrogensulphur emissions in Asia have increased by 4 times since 1980has been improving government cra
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