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Engine (used for making machine (farming machines (can produce more food,…

- - - - reduce hunger
        
        increase populations
        
        more people to work
      - developed agriculture
  - - - can know more about space
- - - - better economy
    - - better economy
    - - planes can be used on sky and can land on land and water.
    - - virus and diseases can spread fast and easy
        
        can kill many people
      - urgent people can move faster
  - - - people can create different jobs with cars like taxi drivers
      - urgent people can move faster ex.ambulance
        
        can even sometimes save human's life
    - - more trading
      - economy gets better
  - - - Global trading started
    - - however, it takes more time
    - - used for luxury long distance traveling
        
        too slow compared to planes
        
        can only be used on water
        
        takes little more time than airplane
        
        it has better and larger space than airplanes
  - - - bad for the environment and human health
- - - - people may need the medicine from other countries because sometimes, certain medicines not produced in some countries
        
        it may save people's lives