• but: 45 mpg is not enough
    • because: the mpg requirement should rise annually
      • because: more cars and pollution, so better mpg needed
      • because: higher mpg rules to force technology to improve
      • because: technology will improve
    • because: all HK private cars should make zero CO2 emissions
      • because: all private cars in HK could be electric
        • but: not enough commercially available electric cars
        • because: limited range of electric vehicle irrelevant in HK
        • but: HK electric production not environmental-friendly
  • but: unfair if only applies to private car owners
    • but: the policy could apply to other vehicles later
  • but: Car with higher fuel efficiency requires...
  • but: no-one could own a luxury car
    • but: the BMW 520d is a luxury car
  • because: many cars available now that do over 45 mpg
    • because: the Subaru Legacy Outback 2.0 TD R does 48.7mp
    • because: the Ford S-Max people carrier does 45.6mpg
    • because: the Toyota Prius 1.5 T3 family car does 65.7mpg
    • because: the BMW 520d executive car does 55.4mpg
    • because: the VW Polo BlueMotion 1.4 TDi does 74.3mpg
All new private cars in HK should achieve over 45 miles per gallon
  • because: it would reduce global warming
    • because: more energy-efficient cars produce less CO2
      • because: CO2 is a greenhouse gas: increases global warming
      • because: Burning one gallon petrol emits 20 pounds of CO2
  • because: it would reduce pollution
  • because: it would be cheaper
    • because: fuel is becoming more expensive
  • but: no-one could own a sports car
    • but: could own an electric sports car:Tesla Roadster
      • but: the Tesla Roadster is not available in HK
  • but: will be legally fought by <45mpg car makers
    • because: unfair trade restriction on car making countries
    • because: precedent - car makers legal action in California
  • but: policy ineffective: only 330880 private cars in HK
    • but: it could save 496,320 tonnes CO2 per year
  • because: better to encourage fuel-efficiency with tax break
    • but: tax breaks are a license for the rich to pollute
    • but: tax breaks reduce tax revenue