Created by Jacob Sipple
over 4 years ago
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Question | Answer |
area subject to flooding(3 parts within) | flood plain(natural levee, backplain, backswamp) |
levee | constructed mounds along a channel that keep flood waters off flood plain |
why is New Orleans susceptible to flooding | located between lake and river, as well as channels coming into the city, levees failed |
top 3 global land uses | 27% livestock, 26% forest, 19%barren land |
which land uses are high risk if global temps increase | permafrost loss, food supply instability |
China and India Ag use % compared to US | % of arable land US 40-50% china: 50-60 india 60-70 |
how does heat affect crop yield | every 2 degrees about -15bushels per acre(120ish is typical) more droughts and less pollination |
how will crop production change as temp rises | moves north |
which northern countries would benefite most from global warming based on ag | canada and russia |
nitrogen cycle | |
denitrification, what conditions allow it to occur | anaerobic, converts NO3 to N2, when not going to completion produces N2O instead(when organic matter is eaten in anaerobic condition) same as CH4 but instead of CO2 there is NO3 main reason because leach into groundwater |
3 major consumers of nitrogen fertilizer | China, India, US |
GHG emissions from food production | 35%(1/2 from livestock) |
how much food is wasted in uss | ~42% |
heat island | urban areas, due to reduced albedo can be up to 10F higher than other areas |
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