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31 Cards in this Set

  • Front
  • Back
Carrying capacity
largest number of individuals an environment can support
population
all individuals of one species
population explosion
rapidly increasing numbers of humans
landfill
area where waste is deposited
conservation
careful use of resources
composting
piling yhard wastes where they can gradually decompose
does the Earth have limited or unlimited resources
limited
by the time you are 75 years old you will have produced enough trash to equal how many
elephants
8
in 1998 what was the human population
5.9 billion
what are some reasons why population is increasing
better medicine and nutrition and sanitation so people live longer
Compared to other countries how much energy do people that live in the US
__
how can farmers increase producti8vity of croplands
higher yield seed and chemical fertilizers
what are herbicides and pesticides
they reduce weeds insects and other pests that can damage crops
what is a problem with removing vegetation
the soil will erode easily
How can no till farming be good for the environment
the land is not loosened by plowing
what percetage of cropland is used for livestock
20%
name 3 things trees are used for
fuel paper lumber
plants remove what gas
carbon dioxide
plants produce what gas
oxygen
what gas may contribute o a rise in temperature on earth
carbon dioxide
what percentage of garbage goes to landfills
60%
what is a sanitary landfill
every days deposit is covered with dirt
what is phytoremediation
plants help remove certain metals from the soil
how do the plants extact the metals
absorb through their leaves
what could be a problem with building with concrete and asphalt
they cause the temperature to rise
does the US have mandatory or voluntary recycling
voluntary
hazardous waste
poisonous waste
recyclabe
any item that can be used and produced again
recyclabe
any item that can be used and produced again
recyclable
any item that can be used againg
recyclable
any item that can be used again