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Lecture2EnvironmentalIssues

Lecture2EnvironmentalIssues - Sulfur Cycle with Human...

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Environmental Issues Lecture 2
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Major Environmental Trends
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Critical Environmental Problems Loss of biodiversity Polluted Water Polluted Air Loss of Productive Soil Greenhouse Warming Ozone Depletion Impacts on Global Geochemical Cycles Summary:  Loss of Critical Natural Capital
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The Global Geochemical Cycles Hydrologic Carbon Nitrogen Sulfur Phosphorous
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Contributions to Global Warming Gas Percent Contribution Carbon Dioxide 50 Methane 19 CFC’s 17 Tropospheric Ozone   8 Nitrous Oxide   4
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The Natural Hydrologic Cycle
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The Hydrologic Cycle - Human Impacts
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The Carbon Cycle
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The Carbon Cycle with Human Impacts
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The Natural Nitrogen-Sulfur Cycle
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The Nitrogen Cycle with Human Effects
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Unformatted text preview: Sulfur Cycle with Human Impacts Phosphorous Cycle with Human Effects Conclusions • Human activities are inducing a 6 th major upheaval. The other five: – Ordovician (440 million years ago) – Devonian (365 million years ago) – Permian (245 million years ago) – Triassic (210 million years ago) – Cretaceous (66 million years ago) • Planetary systems are in distress • Global average temperature is rising • Species extinction rates are 100 to 1000 times higher than before the arrival of humankind • Unsustainable activities are destroying the basis for the economy and ultimately, life itself....
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Lecture2EnvironmentalIssues - Sulfur Cycle with Human...

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