We're in beta! If you find a bug or have feedback, let us know in our 
Ancient Tree Inventory
To build a living database of ancient trees
Multiple locations, including yours!
- Ongoing
Citizen ScienceEcology & EnvironmentNature & OutdoorsBiologytrees, united kingdom
tree
within 25 miles
Dec 3, 2025
115 opportunities found! use fewer search filter criteria to find more opportunities
Filters
2B Technologies, Inc.
AQTreks (AirQualityTreks)
Monitor air pollution levels and map air pollution around the US
Multiple locations, including yours!
- Ongoing
Citizen ScienceNature & OutdoorsGeographyEducationCrowd FundingTransportationEcology & EnvironmentComputers & TechnologyClimate & WeatherChemistryOcean Water Marineenvironmental justiceparticulate matterscienceairoutdoorsclimateair quality indexair qualitysummersmartphone applicationwinterdatastemec2020equitygirl scoutsmobile applicationspringclimate changehikingweatherair pollution monitoringautumnair pollutionandroidcarbon dioxideinvestigationexperimentusacarbon monoxidenatureiphonedatabasecitizen scienceenvironmentcommunity-based monitoringweather dataappglobal warmingclimate monitoringbicycling
Arizona Worm Farm
Arizona Worm Farm: Pomegranate/Fig Tree Basics – Include the Tree
Arizona Worm Farm Arizona
- December 12, 2025 at 7:00 AM
CommunityGeneral Science
Arizona Worm Farm
Arizona Worm Farm: Pomegranate/Fig Tree Basics – Include the Tree
Arizona Worm Farm Arizona
- December 27, 2025 at 7:00 AM
CommunityGeneral Science
Arizona Worm Farm
Arizona Worm Farm: Stone Fruit Tree Pruning Workshop
Arizona Worm Farm Arizona
- December 27, 2025 at 7:00 AM
CommunityGeneral Science
Arizona Worm Farm
Arizona Worm Farm: Stone Fruit Tree Pruning Workshop
Arizona Worm Farm Arizona
- December 27, 2025 at 7:00 AM
CommunityGeneral Science
Arizona Worm Farm
Arizona Worm Farm: VIP Tour
Arizona Worm Farm Arizona
- December 13, 2025 at 7:00 AM
CommunityGeneral Science
NC State University | ecoipm.org | YourWildLife.org
A Tree's Life
To learn how climate & urbanization affect tree growth & health
Multiple locations, including yours!
- Ongoing
Citizen ScienceBiologyEducationClimate & WeatherNature & OutdoorsEcology & Environmenturban ecologyclimate changecarbon sequestrationtrees
Cornell University/New York Department of Environmental Conservation
AVID (Assessing Vegetation Impacts from Deer)
Monitor the effects of deer browsing on woodland trees and plants
Multiple locations, including yours!
- Ongoing through November 30, 2030 at 8:35 PM
Citizen ScienceAnimalsEcology & EnvironmentNature & Outdoorsecologytreeswildlifewildflowersforestdeerseedlingswoodlandsforest health
Airigami
Balloon Breakdown
Help compost 40,000 latex balloons
Multiple locations, including yours!
- Ongoing
Citizen ScienceEcology & Environmentballoonsballooncompostcomposting