People can help solve the problem of pollution by______.
A. urging their governments to control litter and waste
B. cutting down the use of oil and other oil products
C. reducing unnecessary buying, over-consumption and careless disposal of wastes
D. making anti-pollution advertisements
正确答案：C
此题为细节题见文章的最后一句：Pollutionandwastecombine…bycuttingoutunnecessarybuyingexcessconsumptionandcarelessdisposal…
