Are humans responsible for climate change?

Yes, humans are the primary cause of recent climate change (global warming since the Industrial Revolution, particularly the rapid warming of the past several decades). This is the overwhelming scientific consensus, described as “unequivocal” by the Intergovernmental Panel on Climate Change (IPCC) and supported by multiple lines of evidence from observations, physics, paleoclimate records, and climate models.[1]

Scientific Consensus

Key Evidence

Human activities—primarily burning fossil fuels (coal, oil, gas), deforestation, agriculture, and industrial processes—have sharply increased atmospheric concentrations of greenhouse gases (GHGs) like CO₂, methane (CH₄), and nitrous oxide (N₂O). These trap heat, amplifying Earth’s natural greenhouse effect.[5]

Other factors like solar variability or internal climate cycles (e.g., El Niño) influence short-term weather and decade-scale variations but do not explain the long-term trend. The Sun’s energy output has been stable or slightly declining while temperatures rose.[5]

In short, the physics of the greenhouse effect has been understood since the 19th century; modern data and attribution science have confirmed humans as the dominant driver. Continued emissions will cause further warming, with severity depending on the total amount emitted. This conclusion is based on extensive, independently verified research rather than opinion.