The result shows the amount of the index of harm has no connection with the length of branches growing in the very year, the quantity of buds, the density of buds and the content of raw fiber.

Water balance drought flood index is used as the agricultural meteorological index of flood and humidity harm.

These agencies collect data from monitoring stations around the city and calculate an Air Pollution Index (API) indicating the potential harm to human health, with a range of 1-500.