Complex dynamics of Earth's climate not fully understood *

The Earth's climate is a dynamic system in constant flux and dependent upon many variables. It's always changing in ways we barely understand and which are difficult to predict. In this context, the narrative of dangerous anthropogenic disruption remains a hypothesis open to challenge. (#14520)

Earth has been warmer in recent past prior to human impact *

The Earth was warmer in the recent past – i.e. prior to any anthropogenic forcing – than it is now. (#14746)

IPCC process, science and modelling are flawed *

(#37896)

Earth's climate influenced significantly by other factors *

Other (non-human factors) exert a significant influence on the Earth's climate making it difficult to draw any firm conclusions about the significance of antropogenic effects. (#3388)

Increase in CO2 has always followed not led rises in temperature *

Ice-cores dating back nearly one million years show a pattern of temperature and CO2 rise at roughly 100,000-year intervals. But the CO2 rise has always come after the temperature rise, not before, presumably as warmer temperatures have liberated the gas from oceans. (#14791)

Water vapour impact far outweighs impact of CO2 *

Water vapour is the most significant greenhouse gas, accounting for around 98% of the Earth's natural greenhouse warming effect. So changes in carbon dioxide or methane concentrations will have a relatively small impact. (#14797)

No warming observed since 1998 *

Measurements since 1998 via satellites and balloon radiosondes show no warming. (#14742)

Is the Earth's climate really changing? *

(#41667)