Yes, climate change is real.
Global temperatures are rising, primarily due to human emissions of greenhouse gases (especially CO2 from burning fossil fuels, plus methane and others). This is not a matter of serious scientific dispute.
Core evidence
•Instrumental temperature records: Global surface and ocean temperatures have increased roughly 1.1–1.2°C since the late 19th century, with the strongest warming in recent decades. The last decade has been the warmest in the instrumental record. Multiple independent datasets (NASA GISS, NOAA, HadCRUT, Berkeley Earth, etc.) agree.
•Physical fingerprints: The troposphere is warming while the stratosphere is cooling (the expected signature of greenhouse forcing, not solar or other natural drivers). Nights are warming faster than days. The lower atmosphere holds more water vapor.
•Cryosphere and oceans: Arctic sea ice extent and volume have declined sharply; Greenland and Antarctic ice sheets are losing mass; glaciers are retreating worldwide; ocean heat content is rising (oceans absorb >90% of the excess energy); sea level is rising from thermal expansion + meltwater.
•Attribution: Natural factors (solar output, volcanic aerosols, orbital cycles, internal variability like ENSO) cannot explain the post-1950s warming. Climate models that include only natural forcings fail to reproduce the observed trend; models that include anthropogenic greenhouse gases match it. Isotopic signatures of carbon in the atmosphere match fossil-fuel sources.
•Paleoclimate context: Current CO2 levels (~420+ ppm) are higher than at any point in at least the last 800,000 years (ice cores) and likely millions of years. The rate of warming is unusually fast compared with most natural climate shifts in the geologic record.
Major scientific bodies (IPCC, NASA, NOAA, national academies of sciences worldwide, American Meteorological Society, etc.) state that warming is unequivocal and that human influence is the dominant cause of the observed change since the mid-20th century. The “consensus” figures often cited (97%+) reflect the published literature and expert surveys on these basic points.
What is not seriously disputed vs. what has uncertainty
•Settled: The planet is warming; CO2 is a greenhouse gas; humans have raised atmospheric CO2 substantially; this is the main driver of recent warming.
•Ongoing research/uncertainty: Exact magnitude of future warming under different emissions paths (climate sensitivity), regional details, tipping-point thresholds, and the precise contribution of various feedbacks. Weather is not climate—individual storms or cold snaps do not refute the long-term trend.
Short-term variability, measurement adjustments, urban heat islands, and media hype exist and are studied; none overturn the core observations or the physics. Claims that it is “just a hoax,” “only natural cycles,” or “scientists are fabricating data for grants” are not supported by the evidence.
For primary data and summaries, see NASA’s climate site, NOAA’s climate reports, the IPCC AR6, or the Berkeley Earth temperature record.