g21.   Can we mine the oceans?

Ocean mineral resources are found in seawater, itself; in sediments and deposits on the shallow continental shelf; and in sediments and nodules on the deep ocean floor. Only magnesium, bromine, and sodium chloride are abundant enough to be profitable at present prices with current technology.

e19.    What materials can cause water pollution?

m15.    How are freshwater and marine environments managed?

m41.    How can matter affect the environment?

m52.    What causes air pollution?

m55.    What are the environmental impacts of using up our mineral resources?

m56.    How can we increase mineral resource supplies?

m57.    What are sources of solid waste?