The UNFCCC and supporters of the United Nations climate Change Conference are challenged to produce convincing OBSERVATIONAL EVIDENCE that:

1. Variations in global climate in the last hundred years are significantly outside the natural range experienced in previous centuries; Expert discussion
2. Humanity’s emissions of carbon dioxide and other ‘greenhouse gases’ (GHG) are having a dangerous impact on global climate;Expert discussion
3. Computer-based models can meaningfully replicate the impact of all of the natural factors that may significantly influence climate; Expert discussion
4. Sea levels are rising dangerously at a rate that has accelerated with increasing human GHG emissions, thereby threatening small islands and coastal communities; Expert Discussion
   
5. The incidence of malaria is increasing due to recent climate changes; Expert discussion
6. Human society and natural ecosystems cannot adapt to foreseeable climate Change as they have done in the past; Expert discussion
7. Worldwide glacier retreat, and sea ice melting in Polar Regions , is unusual and related to increases in human GHG emissions;Expert discussion
8. Polar bears and other Arctic and Antarctic wildlife are unable to adapt to anticipated local climate Change effects, independent of the causes of those changes; Expert discussion
9. Hurricanes, other tropical cyclones and associated extreme weather events are increasing in severity and frequency; Expert discussion
10. Data recorded by ground-based stations are a reliable indicator of surface temperature trends; Expert discussion