What is the cause of danger in most dangerous places?

• the weather
  Human activity is the cause of danger in most dangerous places. Humans are the cause of war, violence, insurgence, civil unrest, humanitarian issues and terrorism.
• the landscape
  Human activity is the cause of danger in most dangerous places. Humans are the cause of war, violence, insurgence, civil unrest, humanitarian issues and terrorism.
• human activity
  Human activity is the cause of danger in most dangerous places. Humans are the cause of war, violence, insurgence, civil unrest, humanitarian issues and terrorism.