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iNaturalist
Fern Watch
Help track the health of redwood forests
Multiple locations, including yours!
- Ongoing
Citizen ScienceEcology & EnvironmentNature & OutdoorsClimate & Weatherdroughtfogclimatefernredwoodssword ferns
wood burning
within 25 miles
Nov 1, 2025
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IQAir AirVisual
PM2.5 air pollution monitoring
Better understand air pollution and its sources, indoors and out
Anywhere
- Ongoing
Citizen ScienceHealth & MedicinePolicyClimate & WeatherNature & OutdoorsCrowd FundingTransportationEducationcarbonindoorcarsasthmahighwaysmonitoringventilationenvironmentair qualitysmogtrafficemissionsairair pollutantspm2.5co2outdoordustburn banair pollutiondatawood burninghealth
1