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.
Fire safety and speed of evacuation were prime factors in the design of Burj Khalifa. Concrete surrounds all stairwells and the building service and firemanâs elevator will have a capacity of 5500kg and will be the worldâs tallest service elevator.