m57.    What are sources of solid waste?

With only 47% of world's population, the U.S.  produces 33% of the solid waste. Sources of 11 billion tons of solid waste produced each year in U. S. are mining and oil and gas production (75%), agriculture (13%), industry (9.5%), municipal (1.5%), and sewage sludge (1%).  

e19.    What materials can cause water pollution?

e20.    What are environmental hazards and risks?

g17.    Is some matter more useful than other matter?

g21.    Can we mine the oceans?

g27.    How fast are supplies of mineral being used up?