Q:

Cigarette smoking causes two million deaths annually in the industrial states. 

• 1
  Two million deaths are being caused by cigarette smoking annually in the industrial states.
• 2
  Two million deaths have been caused annually by cigarette smoking in the industrial states.
• 3
  Cigarette smoking has been causing two million deaths annually in the industrial states.
• 4
  Two million deaths are caused annually by cigarette smoking in the industrial states.