Which trucks are actually coming?

It is somewhat difficult, when you're out on a nice walk, to distinguish of all the sounds you hear which ones are potential trucks coming around the corner, as suggested in the example in the previous post.

So I decided to make a list of the main potential trucks that people keep talking about lately, and that generate all sorts of dangers, debates, doubts and dilemmas:

• Global Warming due to CO2
  
• Oil peak and the end of reserves
  
• Resource depletion (forests, water, arable land, minerals, etc.)
  
• Global financial system crash
  
• Asteroid hitting the planet
  
• Polar caps meltdown and the Gulf Stream disturbance
  
• Iran nuclear arsenal
  
• Demographic explosion
  
• Terrorism and religious fanaticism
  
• Economic recession or another great depression
  
• China and India economic growth
  
• Russian military revivalism
  
• Pandemics and Epidemics
  
• Crash of Pension schemes due to aging population
  
• Loss of Biodiversity
  
• Violations of human rights
  
• End of democracy
  

If you're actually reading this post, you may like to comment and add to the list, choose the ones that scare you the most, the ones which are less likely to cause any hassle, an so on.

Thanks already for any contributions!