Term
| What percent of water is used for agriculture? |
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Definition
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Term
| What percent of water is freshwater? And what percent of Earth's water is available for drinking? |
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Definition
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Term
| How much of the water cycle are we using? |
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Definition
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Term
| How much was the Aral Sea reduced by? |
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Definition
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Term
| How much has the Ogallala Aquifer's surface dropped? |
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Definition
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Term
| What is salt water incursion? |
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Definition
| It is the seepage of salt water into fresh water aquifers when the aquifers are pumped to quickly. |
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Term
| What is the global energy consumption? |
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Definition
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Term
| What percent of the energy we use comes from fossil fuels? |
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Definition
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Term
| What is the ranking of how bad fossil fuels' emissions are? |
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Definition
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Term
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Definition
| We are getting fewer units of energy per unit of energy consumption. |
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Term
| How much do we need to reduce emissions by? |
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Definition
| 3.8 Gt by 2020, 12.8 Gt by 2030 |
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Term
| How much greater will energy demand be in 2030 than it is today? |
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Definition
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Term
| How much of the world's energy comes from nuclear plants? |
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Definition
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Term
| What is NPP? What is the global level of terrestrial NPP? |
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Definition
| Net primary productivity (energy fixed by plants). 60 PgC/yr |
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Term
| What percent of NPP do we use? |
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Definition
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Term
| What is a species area curve? |
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Definition
S = cA^z
S is number of species
c is the constant (dependent on species)
A is the area
z is a set value (.25-.55 for islands, .1-.2 for a single province, 1 between provinces) |
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Term
| What percent of species are committed to extinction? |
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Definition
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Term
| Describe the findings of the Millenium Ecosystem Assessment: |
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Definition
-Over past 50 years, ecosystems have changed more rapidly and extensively than ever before
-60% of ecosystem services evaluated are being degraded or used unsustainably |
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