Is climate change real?

Yes, climate change is real. It refers to long-term shifts in temperatures and weather patterns, and the current phase of rapid global warming is primarily driven by human activities. This is supported by overwhelming evidence from observations, multiple independent lines of data, and near-unanimous scientific consensus.[1]

Scientific Consensus

The vast majority of climate scientists and major scientific organizations agree:

Public perception often underestimates this consensus, but surveys of experts and literature consistently confirm it.[5]

Key Evidence

Observations from ground stations, satellites, ocean buoys, ice cores, and other sources show clear changes:

These changes align with basic physics of greenhouse gases and are reproduced by climate models when human forcings are included. Natural factors (solar output, volcanoes, orbital cycles) cannot explain the observed warming pattern—e.g., the upper atmosphere is cooling while the surface warms, consistent with greenhouse forcing rather than increased solar energy.[9]

Context and Nuance

Earth’s climate has always varied naturally (ice ages, etc.), but the current warming is much faster than typical natural rates and coincides precisely with the industrial-era rise in human emissions. Attribution studies quantify that humans account for essentially all the net warming since the mid-20th century (or longer).[4]

Uncertainty exists in exact future projections, regional details, and tipping points, which is normal in complex science—but the core facts of warming and human causation are robust and have strengthened over decades of research. Claims denying the reality or human cause contradict the evidence and consensus from primary scientific sources.

For primary data and reports, see NASA’s climate pages, NOAA Climate.gov, and the IPCC AR6.