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