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Kevin Frayer

A woman faces heavy winds during a seasonal sandstorm in Beijing, China. Scientists believe that desertification and climate change are playing a role in their frequency and intensity. Air pollution is detrimental to human health.

Tourists watch tigers at the Heilongjiang Siberian Tiger Park in 2017 in Harbin, China. The park is believed to be the world's largest captive tiger breeding operation.

Tibetan nomads inspect cordyceps fungus for sale at a market on May 22, 2016 in Yushu town on the Tibetan Plateau. The cordyceps fungus, also known as caterpillar fungus, is a parasitic spore that thrives in high altitude, low temperature conditions. While not historically a part of Tibetan culture, cordyceps are a prized ingredient of traditional Asian medicinal treatments that purportedly heal ailments ranging from asthma, to impotence, to cancer. Demand in China alone has created a booming economy for what Tibetans call yartsa gunbu which sells for up to $50,000 US per pound.

Vendors in Beijing wear protective masks as they sell vegetables. A 2014 study found that only 5 percent of Beijing residents had eaten wildlife in the previous year.

This coal-fired power plant in Guizhou province is one of China's newer ones. The country leads the world in carbon emissions—but also in investments in renewable energy.