New Zealand's national science academy, the Royal Society (RSNZ), has challenged climate change "deniers", issuing a statement declaring unequivocally that the globe is warming and that humans are to blame.
"The globe is warming because of increasing greenhouse gas emissions," the society said, reporting the findings of an expert committee on climate.
In summary, the statement says:
The globe is warming because of increasing greenhouse gas emissions. Measurements show that greenhouse gas concentrations in the atmosphere are well above levels seen for many thousands of years. Further global climate changes are predicted, with impacts expected to become more costly as time progresses. Reducing future impacts of climate change will require substantial reductions of greenhouse gas emissions.
The Royal Society is charged by its Act with informing the public about science, and fostering evidence-based scientific debate. We hope this statement makes a useful contribution to public understanding of climate change.