Are we driving today's climate change? I'll gather the latest scientific evidence on human responsibility.
Yes - according to the overwhelming scientific consensus, human activities are the principal cause of the climate change observed in recent decades, especially since the mid-20th century.
What the major scientific bodies say
> There is unequivocal evidence that Earth is warming at an unprecedented rate. Human activity is the principal cause.
•NASA summarizes: Scientific evidence continues to show that human activities (primarily the human burning of fossil fuels) have warmed Earth’s surface and its ocean basins
•The U.S. National Academy of Sciences states: "Scientists have known for some time, from multiple lines of evidence, that humans are changing Earth’s climate, primarily through greenhouse gas emissions."
•The Intergovernmental Panel on Climate Change (IPCC) - the UN body that synthesizes peer-reviewed climate science for policymakers from 195 member countries - has strengthened its conclusions over time:
•The IPCC is now 95 percent certain that humans are the main cause of current global warming
•The report states in its Summary for Policymakers that "human influence on the climate system is clear, and recent anthropogenic emissions of greenhouse gases are the highest in history."
•Its Sixth Assessment Report (2021) stated: “It is unequivocal that human influence has warmed the atmosphere, ocean and land… climate change is already affecting many weather and climate extremes in every region across the globe.”
•Also: “It is unequivocal that human influence has warmed the atmosphere, ocean and land,"
•And: “It is unequivocal that the increase of CO2, methane, and nitrous oxide in the atmosphere over the industrial era is the result of human activities and that human influence is the principal driver of many changes observed across the atmosphere, ocean, cryosphere, and biosphere."
•Since systematic scientific assessments began in the 1970s, the influence of human activity on the warming of the climate system has evolved from theory to established fact.
Other agencies phrase it similarly: “Human activities, principally through emissions of greenhouse gases, have unequivocally caused global warming”
Is there a scientific consensus?
Multiple studies published in peer-reviewed scientific journals show that climate-warming trends over the past century are extremely likely due to human activities
•"Based on well-established evidence, about 97% of climate scientists have concluded that human-caused climate change is happening."
•Recent surveys of the peer-reviewed literature find 98.7% to >99.9% agreement among publishing climate scientists that humans are causing recent climate change, with one survey of 88,125 climate-related studies finding over 99.9% agreement.
Joint statements from scientific organizations also state:
> "Observations throughout the world make it clear that climate change is occurring, and rigorous scientific research demonstrates that the greenhouse gases emitted by human activities are the primary driver."
> "Based on extensive scientific evidence, it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century."
Nearly 200 worldwide scientific organizations hold the position that climate change has been caused by human action
What about natural causes?
Climate has changed naturally throughout Earth's history due to factors like volcanic eruptions, solar radiation variations, and orbital changes. However:
•Climate change is primarily driven by human activities, with greenhouse gas emissions from fossil fuel combustion, deforestation, and industrial processes accounting for the majority of global warming since the Industrial Revolution.
•Natural factors, such as volcanic eruptions and solar variability, play a minor role in current climate change compared to anthropogenic influences.
•Natural processes driving Earth's long-term climate variability do not explain the rapid climate change observed in recent decades. The only explanation that is consistent with all available evidence is that human impacts are playing an increasing role in climate change.
Direct evidence for the human role includes:
•Paleoclimate evidence reveals that current warming is occurring roughly 10 times faster than the average rate of ice-age-recovery warming. Carbon dioxide from human activity is increasing more than 250 times faster than it did from natural sources after the last ice age.
•When scientists run climate models with human emissions, they reproduce the observed warming; without human emissions, the models show little warming.
In short, while natural variability exists, the scientific evidence shows it cannot explain the rapid warming since the 1950s - the increase in greenhouse gases from burning fossil fuels, deforestation, and industrial processes is the dominant cause.