Nature · Missions & impact ledger · iChallenge network
A daily round on the natural world, plus missions that turn a walk into open biodiversity data and real care for a place.
Which app lets anyone contribute wildlife observations to open science?
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One ranked attempt per day. Practice as much as you like.
What players on NatureChallenge.com have actually done. Every check-in and approved proof adds one line. The math behind each number is shown on the card, with its source. Full ledger →
Local missions are things you can do where you live — in Columbus that means your own street, shoreline or school. Global missions add up across every arena on the network.
Photograph and identify ten wild species (plants, birds, insects, anything) within walking distance of home. Post the list and a link.
+1 actions when approvedCounted as one completed survey. Upload your sightings to iNaturalist or GBIF and your list becomes open biodiversity data.
Counted with SavingTheWorld.org
Give two hours to a conservation, garden, trail or watershed group near you. Post the group's name and what you did.
+2 hours when approvedCounted as two hours given. Groups you help may also list the work on Contrib.com.
Counted with Contrib.com
Plant a native tree where it can survive, or sponsor one through a verified planting program. Post the species, the place and a photo or receipt link.
+1 trees when approvedOne tree. We count trees planted or protected, not carbon, because a sapling's CO₂ uptake depends on survival, species and decades of time.
Counted with SavingTheWorld.org
Spend an hour clearing litter from a beach, riverbank, park or your own street. Post a photo link or a short note with the spot and roughly how much you collected.
+4 kg waste when approvedOne full standard trash bag of mixed litter weighs about 4 to 6 kg (Ocean Conservancy International Coastal Cleanup averages). We count 4 per approved cleanup.
Counted with SavingTheWorld.org
Run a 20-minute session for a classroom, team or family on one topic from this arena. Post a photo link or a one-paragraph recap with how many people joined.
+1 hours when approvedCounted as one hour given. Reach is noted in your proof but not multiplied.
Counted with Contrib.com
Each day note the high tide time, water temperature if posted, and wind at your nearest shore or lake. Check in daily.
+1 actions per check-inCounted as one logged observation per day.
SavingTheWorld.org is the impact home of the eCorp network: 2% of every venture is set aside for the planet and for keeping AI safe. Planet-track missions roll up there.
Community trackContrib.comContrib.com is where contributors earn a stake in the ventures they help. Community-track missions count hours and local actions.
Free alerts for every Florida county when sewage is spilled, algae toxins are detected, lake discharges surge or the Weather Service issues a warning. The local-mission radar for this arena.
Alerts, every marketAlertStream.comEcoBoard’s alert engine expanding beyond Florida: weather warnings, water quality and other concerning events for any place you follow, so a mission can start the day something changes near you.
Daily briefingClimateNews.comThe climate newsroom of the network: what moved today, with sources, so the daily round has something real to ask about.
Check-ins are self-reported and shown as logged. Proof missions are reviewed by a person before they count as verified. Each per-action figure is a conservative public estimate (EPA, IEA, UN Environment or peer-reviewed sources named on the card), rounded down. These numbers are for keeping score and staying honest, not for carbon accounting or offsets. If you think a figure is wrong, say so on the contact form and we will fix it in public.
Live counts from NatureChallenge.com. All arena stats →
Earned on any arena, shown on your profile everywhere.
Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
Fund a prize on NatureChallenge.com and your brand sits on the challenge card, the leaderboard and every finisher's share. Prizes only appear once they're funded, so players can trust what they see.
A phone camera covers most photo challenges.
Only what you post. Location data is never required.
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.