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If the U.S. stopped recycling and buried all of its trash for the next 100 years in a single landfill that was 30 feet high, how much of the nation’s land area would this cover?

In the decade following Britain’s 1997 civilian handgun ban and confiscation, did the homicide rate generally increase or decrease?

Which is greater: the money spent by the federal government each year on social programs, or the global real property value of the 557,000 facilities owned by the U.S. Department of Defense?

Can fuel or waste from commercial nuclear power plants be accidentally or intentionally used to produce a nuclear explosion?

What portion of all public school students receive services from federally supported special education programs for children or youth with disabilities?

Do higher marginal tax rates generally reduce the incentive to work?

Can the U.S. Constitution be amended without the approval of Congress or the President?

Is the labor force participation rate for 25- to 54-year-olds in the U.S. now higher or lower than it was when the Great Recession ended in June 2009?

How much higher is the average annual tuition for a four-year degree at private for-profit colleges than private nonprofit colleges?

What portion of all pregnancies in the U.S. are unintended?