Which of the following is not an international enviormental problem
a. air pollution
b. water pollution
c. global warming
d. overstocked fishing sites

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Describe at least three examples of how people and wildlife have adapted to their environments in the middle east.

People keep spending additional units of a particular resource on a want until their marginal benefit is  decreasing withgreater thanless thannot affected by  their marginal cost.