### Comment:
Oil is there, there is nothing to worry about.  
  
 Your hemp fueled engine of the year 4200 is going to take an assload of research to be able to sustain a billion pound airplane in the air along with any ship.

### REPLY:
once we can grow hemp as tall as white pines we will be able to hollow them out and live in the dried husks, the ones that are too thin and tall will be made into trebuchets and be used to propel people to their travel destinations thus negating planes all together. I’m betting 4-7 years and we have 100’ hemp plants propelling people to mars using no oil

### END.