Correction: 11 October 2026. This revision corrects “anthropomorphic” to “anthropogenic,” removes dated numbers without clear periods, and separates public opinion from scientific evidence.

Anthropogenic means caused by human activity. Anthropomorphic means giving human characteristics to something else. The terms are not interchangeable. A careful climate explanation also separates three questions: what has changed, what caused the change, and what its consequences are.

Observation is the starting point

NASA summarises multiple observations, including warming at the surface and in the ocean, declining ice and rising sea level. They concern different parts of the system. Agreement across independent measurements makes the case stronger than relying on a single number.

Attribution asks a different question

A temperature record shows change; an explanation of cause requires additional physical evidence and analysis. The IPCC synthesis report assesses both observations and human influence. It reports warming of about 1.1°C in 2011–2020 relative to 1850–1900. Both periods belong with the number: it is not an exact temperature rise for every location or for every later year.

Build a reusable reading card

For each statistic in an article, make a short record:

  • Quantity: temperature, ocean heat, sea level, ice area or ice mass?
  • Coverage: one station, a region, an ocean basin or the globe?
  • Period: one event, a yearly average or a multi-decade trend?
  • Comparison: relative to which baseline, and using which unit?
  • Source: a measurement series, assessment report, model result or opinion poll?

For example, a survey asking whether people believe in warming measures public opinion. It may help researchers understand communication or politics, but it cannot measure the planet's heat content. Conversely, a physical measurement does not reveal how the public understands a proposed policy.

Handle impacts at the right scale

A global trend should not be used to invent a precise local forecast. For planning, look for evidence appropriate to the location, hazard and time horizon. A coastal property decision and a regional agricultural decision need different information even when both involve climate risk.

The next article considers how to assess measures intended to reduce warming.

Compare a trend with its uncertainty and time window

A single unusually hot or cold day is not a measurement of a long-term global trend. Keep local weather, a regional average and a global estimate separate. The IPCC synthesis report is a primary assessment source for the wider evidence and attribution questions.

For a hypothetical data exercise, graph the same series over short and long windows and inspect how the apparent direction changes. Preserve the baseline, units and coverage rather than choosing endpoints for a desired impression. Use the evidence for the actual question; an imperfect individual argument does not erase independent observations.