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Climate and environment indicators for all countries from the World Bank Open Data — CO2 emissions, renewable energy, forest area, access to electricity, and more.

Active and historically active volcanoes worldwide from the Smithsonian Global Volcanism Program — eruption histories, locations, and classifications.

Significant earthquakes (magnitude 4.5+) worldwide from the USGS Earthquake Hazards Program, with seismic network sources and tectonic regions.

All 118 chemical elements with atomic properties, classifications, electron configurations, and discovery information.

US tide and current monitoring stations from NOAA's Center for Operational Oceanographic Products and Services (CO-OPS) — station metadata, tide predictions, and water levels.

Severe weather events across the United States from NOAA's Storm Events Database — tornadoes, hurricanes, floods, wildfires, and more with narratives and impact data.

Global tropical cyclone tracks from NOAA's International Best Track Archive (IBTrACS) — storms, basins, and sampled track points for the last 3 years.

Common chemical compounds from PubChem — molecular properties, structure identifiers, and classification for well-known molecules.

Clinical trials for Alzheimer's disease from ClinicalTrials.gov — studies, conditions, interventions, sponsors, and outcomes.

All Nobel Prize laureates from 1901 to present, with prize categories, years, and motivations.

Asteroids and comets that pass near Earth, from NASA's Center for Near Earth Object Studies (CNEOS) — orbital parameters, size estimates, and close approach data.

Confirmed exoplanets and their host stars from NASA's Exoplanet Archive, with discovery methods, facilities, and orbital parameters.