Any fossil fuel like tar, gas, etc
        
             
        
        
        
Only 22% of the Nile's course runs through Egypt.
        
             
        
        
        
The largest continent is Asia. It covers 29% of earth's land area. in 2016 alone Asia had 4.436 billion people in it. Asia is 17.21 million mi^2. 
        
                    
             
        
        
        
Are you sure you wrote it right?  :-(
The function f(x)=2x-5 is a linear function. 
Unless otherwise stated (and that does not seem to be the case) in the real numbers domain, x may assume any value. 
The same can be said to y.  
So, the lowest output value approached by this function is -∞
(minus infinity).
:-)
 
        
             
        
        
        
I would say a natural disaster like a forest fire that could kill trees that are their homes. A forest fire could kill the trees and also the cones they eat for food and thus destroy their habitat and also a source of food and the branches they use to travel from one tree to another in the upper stories of the forest.