co2

within 25 miles

Apr 20, 2026

Near

Distance

From

Until

10 opportunities found! use fewer search filter criteria to find more opportunities

Filters

Activity Type

Age

Kids Friendly Only

21+ Only

Participant Age Range Minimum

100

Participant Age Range Maximum

100

Cost

Any Cost Free Only

Topic

Venue Type

Host Organization

Partner Organization

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 Marinecitizen scienceair pollution monitoringcarbon monoxideair pollutionparticulate matterbicyclingnatureenvironmentweather dataclimateclimate changesummerappair quality indexdatabaseairmobile applicationgirl scoutsexperimentglobal warmingsciencespringair qualityclimate monitoringcommunity-based monitoringcarbon dioxideautumnweatherhikingstemusainvestigationec2020outdoorssmartphone applicationdataandroidwinterenvironmental justiceiphoneequity

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 & Environmenttreescarbon sequestrationurban ecologyclimate change

Dr. Kevin Gurney

Hestia Traffic App

To improve the data of on-road CO2 emissions

Multiple locations, including yours!

Ongoing

Citizen ScienceClimate & WeatherEcology & EnvironmentTransportationclimateemmisionpollution

TreeMama.org

iSeaTree

Help resource managers study and record the benefits of urban trees!

Multiple locations, including yours!

Ongoing

Citizen ScienceEcology & EnvironmentNature & OutdoorsGeographytreesleafaico2changeartificial intelligenceappplanturban treestreecarbonclimateclimate changeiphoneforesth2ocitywoodscitiesmapscanopyparkipadidentificationandroidurban

It's TreeTime Tempe!

Record location and details of local trees

Multiple locations, including yours!

Ongoing

Citizen ScienceNature & OutdoorsEcology & Environmentmappingneighbourhoodarboristurban foresttrees

Maricopa County Library District (MCLDAZ)

Maricopa County Library District: Mini-Rockets Using CO2

MCLDAZ - Fountain Hills Branch Arizona

April 25, 2026 at 7:00 AM

CommunityGeneral Science

IQAir AirVisual

PM2.5 air pollution monitoring

Better understand air pollution and its sources, indoors and out

Anywhere

Ongoing

Citizen ScienceHealth & MedicinePolicyClimate & WeatherNature & OutdoorsCrowd FundingTransportationEducationdatacarbontrafficair qualitycarsenvironmentair pollutionventilationburn bansmogasthmaco2wood burningairhighwayspm2.5emissionsoutdoorair pollutantshealthdustindoormonitoring