It can be argued that virtually every service provided by forests can be viewed as having some combination of economic and ecological values.Which of the following forest services would you classify as being the most directly "economic" of these choices? 

A)  purification of air and water 
B)  influencing local and regional climate 
C)  provision of biomass, recreation and ecotourism 
D)  storing carbon and protecting diversity

Which statement is the best example of - a synergistic interaction? 

A)  The combined effects of alcohol and a depressant produce a greater effect than would be expected from adding their individual effects. 
B)  When the exponential growth of the human population exceeds the carrying capacity, a massive dieback will occur. 
C)  The use of alcohol reduces the effectiveness of a blood thinner. 
D)  Secondary smoke may increase chances of lung cancer in a nonsmoker.

Which of the following is most likely to occur at shallow crustal levels?

A) ductile behavior
B) brittle deformation
C) growth of new minerals
D) recrystallization of minerals
E) metamorphism