• because: global warming is bad
    • because: drains up water sources
      • because: loses ability to retain water
    • because: affects animals' livelihood
      • because: examples
    • because: reduce summer stream flows
    • because: problem with precipitation
    • because: glacier retreat
    • because: extreme weather events
      • but: not related to global warming
    • because: rising of sea level
      • but: not rising
    • because: increases death rate
    • because: population movement
    • because: physical problems and diseases
    • because: reduces hydropower
      • but: other replacements
    • because: failing crops etc.
      • but: relocates crop production
    • but: +ve effects on ecosystem
      • but: not necessarily good
        • because: decreases biodiversity
      • but: no compensation in growth
      • but: CO2 not everything
      • because: CO2 enhances plants' growth
    • because: -ve impacts to natural lives
      • but: species can migrate
      • but: not necessarily bad
        • because: favors growth
      • because: extinctions of species
    • because: risk of forest fire
      • but: jungles don't
      • but: not due to global warming
  • because: causes global warming
    • but: no global warming is occuring
      • because: within normal range
        • but: unprecedented increase
    • because: CO2 is a greenhouse gas
    • because: increases CO2 concentration
    • because: solar irradiance
      • but: unconnected to solar activity
      • because: Mars has global warming
        • but: Mars wobbles, changing climate
We should reduce the use of fossil fuels
  • but: filtered fuels non-polluting
    • because: e.g. filtering coal smoke
      • but: very few coal-fired power stations use filters
  • because: major source of pollution
    • because: produces pollutants
      • but: pollutants can be reduced
    • because: cleaner alternatives
      • but: dangerous alternatives
        • but: comparatively less
          • but: deaths per kilowatt
      • but: not enough uranium for nuclear
      • but: expensive
        • because: investment cost
          • but: not expensive in long run
            • because: resource's running out
            • because: save money from pollution
  • but: basis of world economy: damage it if used less
    • but: global warming damages economy