The herbaceous mile-a-minute weed Mikania micrantha Kunth (Asteraceae) is an invasive plant that is known to cause substantial economic and ecological loss in forestry and plantation sectors in its introduced range of Asia-Pacific countries (Sankaran et al., 2008).
Burj Dubai has around 160 flights of stairs.Now called Burj Khalifa. The total number of stairs to Level 160 (the top habitable floor)of Burj Dubai is 2,909; to climb even higher (46 more maintanence levels), ladders are used.
1 (c) (1) The rise of every step in a stairway shall be not less than 4 inches nor greater than 7 1/2 inches. ( 2 f) ... There shall be not more than 12 feet vertically between landings.  So, there could be as many as 36 4-inch (minimum) steps in a 12-foot (maximum) flight of stairs. In the kind of doubled-back flight of stairs typically seen in a multi-storey stairwell, each flight is probably going to be between 8 and 10 steps, depending on the floor spacing.