Earth Focus speaks with Jonathan Watts, Asia environmental correspondent for UK's The Guardian about his new book "When a Billion Chinese Jump". Watts travelled more than 100,000 miles across China, looking at cancer villages, toxic air and water pollution and issues that may affect China's ability to feed itself -- melting glaciers and acute water shortages. The environment is now recognized as a security issue in China and Watts addresses how the Chinese leadership is responding. The choices that the world's most populated country makes in the years ahead will have global impact.

Earth Focus speaks with Jonathan Watts, Asia environmental correspondent for UK's The Guardian about his new book "When a Billion Chinese Jump". Watts travelled more than 100,000 miles across China, looking at cancer villages, toxic air and water pollution and issues that may affect China's ability to feed itself -- melting glaciers and acute water shortages. The environment is now recognized as a security issue in China and Watts addresses how the Chinese leadership is responding. The choices that the world's most populated country makes in the years ahead will have global impact.