What is one cleanup method for controlling cultural eutrophication? 

A)  using advanced waste treatment 
B)  planting excess plants near sewage discharge sites 
C)  treating plant growth with herbicides 
D)  harvesting excess weeds

What are some factors that could allow flood basalts to have high-volume eruptions?

A) a large amount of magma is generated in the mantle
B) magma rises to the surface along thick dikes
C) the magma is hot and has a low viscosity
D) all of these

What is caused by carbon monoxide poisoning? 

A)  sped up reflexes 
B)  headaches and dizziness 
C)  too much oxygen in the blood 
D)  sharpened thinking and perceptions

____________________ is the process in which plant roots are used as a filter to absorb pollutants such as radioactive strontium-90.

_________________________ can be used in stationary applications like generating electricity or heating buildings,and they can be used for powering vehicles,buses,and trains.

The source of heat for the water emitted by black smokers at the mid-ocean ridges comes from:

A) magma
B) friction
C) radioactive decay
D) an unknown source

Which statement most accurately compares subsurface mining to surface mining? 

A)  Subsurface mining produces more waste material than surface mining. 
B)  Subsurface mining extracts more of the resource than surface mining. 
C)  Subsurface mining is more dangerous than surface mining. 
D)  Subsurface mining disturbs more land than surface mining.

Sewage treatment produces a gooey ____________________ that contains a slimy mixture of bacteria-laden solids,and often toxic chemicals and metals.

What is one major environmental effect of raising livestock? 

A)  reduced erosion 
B)  reduced fossil fuel use 
C)  water contamination 
D)  bad smells

What is one way that individuals in a constitutional democracy influence and change government policies? 

A)  by NOT voting 
B)  by NOT lobbying 
C)  by NOT participating in grassroots activities 
D)  by freely expressing public opinion