The dead zone in the Gulf of Mexico is primarily the result of
A) nonpoint sources of pollutants.
B) point sources of pollutants.
C) a natural cycle related to cold ocean currents.
D) industrial pollution by oil refineries in the New Orleans region.
Question 2
Small subsistence farms in developing nations
A) had a sustainable use of the environment when populations were smaller than now.
B) have mostly depleted the natural environment, making farming no longer possible.
C) can support the developing populations at up to 10 times their current population size.
D) have polluted rivers and streams and destroyed surrounding forests.
A hypothetical hybrid zone.
Succession in the intertidal zone involves colonization and competition for limited space among spec
Dead polar bears
SDS PAGE Result
Sources and Amounts of Oil Released into North American Marine Waters
Sources of acid deposition