Claim reviews
Earth is not at risk of becoming a hothouse like Venus, as Stephen Hawking claimed
Stephen Hawking in BBC:
"Trump's action could push the Earth over the brink, to become like Venus, with a temperature of two hundred and fifty degrees, and raining sulphuric acid."
— 06 Jul 2017
Energy Secretary Rick Perry incorrectly claims CO2 is not primary cause of climate change
Rick Perry in CNBC:
"Most likely the primary control knob [on climate change] is the ocean waters and this environment that we live in."
— 20 Jun 2017
Natural variability can not explain modern global warming, as Heartland Institute report claims
Craig Idso, Robert Carter, S. Fred Singer in Heartland Institute:
"Neither the rate nor the magnitude of the reported late twentieth century surface warming (1979–2000) lay outside normal natural variability."
— 30 May 2017
A lull in solar activity would have little effect on global temperatures; claims of “global cooling” are not based on science
Craig Idso, Robert Carter, S. Fred Singer in Heartland Institute:
"Forward projections of solar cyclicity imply the next few decades may be marked by global cooling rather than warming, despite continuing CO2 emissions."
— 30 May 2017
Global warming has not “ceased”, as Heartland Institute report falsely claims
Craig Idso, Robert Carter, S. Fred Singer in Heartland Institute:
"global warming ceased around the end of the twentieth century and was followed (since 1997) by 19 years of stable temperature"
— 29 May 2017
CO2 is a greenhouse gas that caused warming during past climate changes, notably as a feedback amplifying other factors
Craig Idso, Robert Carter, S. Fred Singer in Heartland Institute:
"Increases in atmospheric CO2 followed increases in temperature. Therefore, CO2 levels could not have forced temperatures to rise."
— 26 May 2017
Heartland Institute report’s claim that climate models are too sensitive to CO2 does not reflect evidence
Craig Idso, Robert Carter, S. Fred Singer in Heartland Institute:
"[climate models] systematically over-estimate the sensitivity of climate to carbon dioxide ... and modelers exclude forcings and feedbacks that run counter to their mission"
— 23 May 2017
Heartland Institute report incorrectly claims no evidence of human impacts in melting ice
Craig Idso, Robert Carter, S. Fred Singer in Heartland Institute:
"Melting of Arctic sea ice and polar icecaps is not occurring at ‘unnatural’ rates and does not constitute evidence of a human impact on the climate."
— 17 May 2017
Global sea level rise is accelerating, despite Heartland Institute report’s claims otherwise
Craig Idso, Robert Carter, S. Fred Singer in Heartland Institute:
"Best available data show sea-level rise is not accelerating. Local and regional sea levels continue to exhibit typical natural variability—in some places rising and in others falling."
— 08 May 2017
The Sun cannot explain recent global warming, contrary to what Heartland Institute report claims
Craig Idso, Robert Carter, S. Fred Singer in Heartland Institute:
"Solar forcings are not too small to explain twentieth century warming. In fact, their effect could be equal to or greater than the effect of CO2 in the atmosphere."
— 03 May 2017