Name the second-most populated city of South Africa, which could run out of water this summer if it doesn't receive significant rainfall before then?

In what city, which previously hosted the 2008 Summer Olympics, will the next Winter Games be held in 2022?

Following a change announced this week by China's government, what will be the new term limit for President Xi Jinping?

. In what U.S. state were schools recently closed for days because of a strike by teachers and other school employees, who demonstrated for higher wages and better benefits?

This week, the U.S. government announced it was creating a task force to address what issue, which causes tens of thousands of deaths each year?

The World Health Organization notes that about 28 percent of the global population lacks access to what resource in their homes?

According to Thursday's show, where could an international conflict break out that may kill no one but affect almost everyone?

More than 60 percent of China's energy comes from what fossil fuel, which is inexpensive to produce but also pollutive to the environment?

According to Common Sense Media, what percentage of American teenagers report feeling addicted to mobile devices?