Xi Zhi Nong speaks about some of his best moments as a wildlife photographer.
Faced with such serious smog and haze, a reporter from Henan speaks with residents about PM 2.5 masks that are useful for blocking dust and smog. A doctor is also interviewed about the effectiveness of such masks and how residents can prevent diseases caused by smog in their daily lives.
How are hailstones formed? Watch and find out!
Ever wondered why there aren't any black or green flowers out there? Find out why in this video!