Agriculture and Food
NUTRITION & FOOD SUPPLIES
~ although enough food is being produced to feed everyone, it is unevenly
~undernourished: consuming less than enough calories needed for an active,
~over nutrition: too many calories
-air pollution is the most widespread environmental damage.
-147 million metric tons of air pollution released each year by the US.
-the world releases about 2 billion metric tons a year.
-air quality has improved over the past 20
Weather is the day to day fluctuations in the atmosphere while Climate
describes temperature and humidity changes over long periods of time.
Climates are not static- they cycle through yearly, centurial (is that a word?)
and millennial patterns.
Biodiversity preserves three ecological systems -Genetic Diversity: the
measure of the variety of different versions of the same genes with individual
species -Species diversity: the number of different kinds of organisms
Tolerance Limits and Species Abundance
tolerance limits- the maximum and minimum levels beyond which a particular
species cannot survive or is unable to reproduce, ex. temperatures, moisture
levels, nutrient supply, soil a