• About this response
• Slide 1: Who is Leon Ashby?
• Slide 2: What this debate is NOT about
• Slide 3: “No one has any evidence that CO2 will over heat the Earth”
• Slide 4: Is CO2 a pollutant?
• Slides 5-7: “Extra CO2 makes the Earth greener”
• Slide 8: Only 3.4% of CO2 is human-caused
• Slide 9: Human caused CO2 emissions
• Slide 10: How much will the Government’s ETS cost?
• Slide 11: “Eliminating Australia’s emissions will cost at least $91,000 per taxpayer per year”
• Slide 12: Every few months China increases emissions as much as Australia’s total
• Slide 13: Cost to reduce all Australia’s emissions
• Slide 14: Spain’s move to renewable energy…
• Slide 15: Al Gore has shares in carbon trading
• Slides 16-18: “Supported by just 5 independent scientists”
• Slide 18: Petition of 31,000 independent US scientists
• Slide 19: What is Earth’s normal temperature?
• Slide 20: Three periods in last 5,000 years “warmer than today”
• Slide 21: Climate change is natural & warmer periods occur without human CO2 emissions
• Slide 22: 1870-1975 “contradicts” warming from CO2
• Slide 23: “Temperatures falling” while CO2 keeps rising
• Slide 24: CO2 “rarely correlates” with temperature
• Slide 25: Oceans “cooled” since 2004
• Slide 26: Arctic sea-ice
• Slide 27: Sea levels “stationary since 2006”
• Slide 28: Ice cores show temperature rose before CO2
• Slide 29: Accuracy of IPCC temperature predictions
• Slide 30: Predicted IPCC Temperatures vs “real” Global temperature
• Slides 31-38: Ferenc Miskolczi
• Slide 39: Impact of the ETS on 14 businesses
• Slide 40: Price rises in the first few years of an ETS
• Slide 41: IEA says “$225 a tonne” carbon required
• Slide 42: Climate action means back to the caves
• Slide 43: Australia’s economy “equivalent of Cambodia’s within 10 years”
• Slide 44: Get involved and make a small difference
• Slide 45: Science & logic ignored

Right

Half-right

Wrong

Red herring

Please forward this critique to anyone who finds Ashby’s presentation persuasive. Constructive criticisms or comments are welcome. Email

Dialogue - Leon responds

I called Leon Ashby to let him know about this response to his presentation and he politely agreed to look into it. This ongoing dialogue is here, published with his permission.

Leon Ashby's presentation on SlideShare

Other sources debunking this material

• What’s wrong with climate deniers? They create dangerous confusion, by Keith Burrows, Australian Institute of Physics (Vic) Education Committee
  
• Skeptical Science blog by John Cook
• Ray Evans' 'Nine facts about climate change' debunked, by ‘Nexus6’. Parts: 1, 2, 3, 4 & 5.
• Debunking the 'Skeptics Handbook': More CO2 Does Worsen Climate Change, by Jeremy Jacquot
• A response to Leon Ashby's presentation: ‘Why an Emissions trading Scheme (ETS) is not necessary’ by Michael Wever