How Nurture sources every public dataset and instrument it uses — with citations and explicit limitations.
The Climate Opinion Comparison feature compares your responses against weighted aggregate results from Yale and George Mason's Climate Change in the American Mind: Beliefs & Attitudes, Fall 2025, a national survey of U.S. adults age 18+ conducted November 6–14, 2025.
What we use: published percentages from the Yale/GMU report. What we do not use: respondent-level raw survey data. We do not, and cannot, claim that a single user's profile statistically matches any specific subgroup in the survey.
The assessment uses the validated 13-question Climate Anxiety Scale (CAS, 2020) by Dr. Susan Clayton. The CAS measures two dimensions: cognitive-emotional impairment and functional impairment. Score interpretation follows thresholds established in the original validation literature.
Citation: Clayton, S., & Karazsia, B. T. (2020). Development and validation of a measure of climate change anxiety. Journal of Environmental Psychology, 69, 101434.
Air-quality data comes from the U.S. Environmental Protection Agency's Air Quality System (AQS). EPA AQS reporting lags by approximately one year, so Nurture queries the most recent full calendar year of validated data. Readings reflect that period, not current conditions.
Light-pollution measurements use VIIRS (Visible Infrared Imaging Radiometer Suite) Day/Night Band satellite data via the Earth Observation Atlas, retrieved through a server-side function so the underlying scientific dataset is queried directly.
Additional hazards (where shown) are sourced from official government and peer-reviewed scientific datasets. Nurture does not use simulated or dummy data for environmental features. New sources and any corrections are logged on the Site Updates & Editorial Notes page.