Is climate change real?
Yes, climate change is real. It is unequivocally happening, driven primarily by human activities, according to the overwhelming consensus of climate scientists and major scientific organizations worldwide.[1]
Scientific Consensus
Multiple independent studies of peer-reviewed literature and surveys of climate experts show extremely high agreement:
The IPCC states it is “unequivocal that human influence has warmed the atmosphere, ocean and land.”[4]
Key Evidence
Multiple independent lines of evidence confirm ongoing climate change:
Earth’s climate has always varied naturally over long timescales (ice ages, etc.), but the current rate and magnitude of warming—especially since the Industrial Revolution—are unusual in the context of the last several thousand to hundreds of thousands of years and match the expected effects of elevated greenhouse gases.[7]
In short, the evidence from direct measurements (thermometers, satellites, ice cores, ocean data), paleoclimate records, and physics-based models is robust and consistent. Climate change is an established scientific fact, not a matter of debate within the expert community. Ongoing research continues to refine details of impacts, regional effects, and future projections under different emissions scenarios.
Citations (8)
- https://archive.is/2025.02.12-121037/https://science.nasa.gov/climate-change/faq/do-scientists-agree-on-climate-change/
Backs: “It is unequivocally happening, driven primarily by human activities, according to the overwhelming consensus of climate scientists and major scientific organizations worldwide.”
evidence, article, points to yes. Claim: Overwhelming scientific consensus that climate change is happening and human-driven; about 97% or more of publishing climate scientists agree.
- https://iopscience.iop.org/article/10.1088/1748-9326/ac2966
Backs: “A 2021 analysis of over 88,000 climate-related papers found greater than 99% consensus that human activities are the primary driver of recent climate change.”
statistic, article, points to yes. Claim: A 2021 analysis of over 88,000 climate papers found greater than 99% consensus on human-driven climate change.
- https://www.climate.gov/news-features/climate-qa/isnt-there-lot-disagreement-among-climate-scientists-about-global-warming
Backs: “There is no significant disagreement among climate experts on the core facts.”
attribution, article, points to yes. Claim: NASA, NOAA, IPCC, AMS and national academies affirm human-caused warming; no significant disagreement among climate experts on core facts.
- https://www.ipcc.ch/report/ar6/wg1/chapter/chapter-3
Backs: “The IPCC states it is “unequivocal that human influence has warmed the atmosphere, ocean and land.””
attribution, official document, points to yes. Claim: IPCC states it is unequivocal that human influence has warmed the atmosphere, ocean and land.
- https://www.climate.gov/news-features/climate-qa/what-evidence-exists-earth-warming-and-humans-are-main-cause
Backs: “Earth’s average surface temperature has risen by roughly 1.0–1.4°C (about 1.8–2.5°F) since the late 19th century/pre-industrial period (1850–1900 baseline), with most warming in recent decades. The past decade includes the warmest years on record.”
statistic, article, points to yes. Claim: Global surface temperature has risen roughly 1.0–1.4°C since the late 19th century, with the warmest years in the past decade.
- https://www.enerdata.net/publications/daily-energy-news/wmo-reports-record-greenhouse-gas-concentrations-2025.html
Backs: “This increase is far faster than natural changes in the paleoclimate record.”
statistic, article, points to yes. Claim: Atmospheric CO2 rose from ~280 ppm to over 420 ppm, with methane and nitrous oxide at record highs.
- https://science.nasa.gov/climate-change/evidence/
Backs: “Shrinking ice sheets (Greenland and Antarctica losing hundreds of billions of tons of ice per year), declining Arctic sea ice, retreating glaciers, rising global sea levels, shifting species ranges, earlier plant blooming, and more frequent/intense heatwaves, heavy precipitation, and certain extremes in many regions.”
evidence, article, points to yes. Claim: Physical impacts such as ice loss, sea level rise, and current warming rate being unusual relative to past natural variation.
- https://www.metlink.org/resource/ipcc-2021-the-evidence-for-climate-change/
Backs: “Fingerprint studies link the patterns of warming (e.g., troposphere warming and stratosphere cooling) to greenhouse gases.”
evidence, article, points to yes. Claim: Models reproduce observed warming only with human emissions; fingerprint studies link warming patterns to greenhouse gases.