SHIJIAZHUANG, June 29 (Xinhua) -- As the sun rises over a green fitness trail in Xingtai in north China's Hebei Province, a group of cyclists pedals in unison, their wheels humming along the smooth, ...

It revealed that the impact of artificial light is more pronounced at the end of the growing season than at the beginning. In the cities analyzed, the start of the urban growing season is 12.6 days ...