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Is the average temperature of the earth at ground level warmer now than it was 1,000 years ago?

What was the main conclusion of a 2020 CDC review of all “gold standard” studies that examined the effects of masks on the transmission of the flu in non-healthcare settings?

Which of the following initiatives caused a 50% reduction in felony arrests for high-risk male youth in one of the nation’s largest school districts?

What portion of unauthorized immigrants in the U.S. have false identity documents that might allow them to illegally work, vote, and receive welfare?

Relative to other nations, how do U.S. fourth graders rank in terms of their math ability?

Which US. president derecognized the government of Taiwan and declared that the Communist government in China is the sole legitimate ruler of both China and Taiwan?

When politicians and journalists use the phrase “carbon pollution,” to which of the following substances are they typically referring?

In scientific surveys of non-citizens, what portion of them stated “I definitely voted” in the U.S. presidential elections of 2008 and 2012?

In 2021, what portion of the U.S. economy was consumed by federal, state, and local government spending?

Which nation has the longest-standing written constitution of all nations in the world?