How the environment and climate communities compare
A few giants dominate — r/environment, r/climate and r/urbanplanning together account for 82% of the combined membership. Size and activity don't line up perfectly: r/environment has the most members, but r/climate gets the most new posts (about 32 a day, against 20 in r/environment). Per member, the liveliest is r/Environmental_Careers: 12 posts a day from 39K members — a smaller crowd, but an engaged one. The oldest is r/environment, founded in 2008, and only one community here is younger than five years: r/ClimateShitposting (2021).
The 11 biggest environment and climate subreddits
r/environment 1,558,129 members · ~20 posts/day · +297 since Oct 26 · since 2008Current news, information and issues related to the environment.
- Cr/climate ↗ 237,206 members · ~32 posts/day · since 2008
Truthful and accurate information about the world's climate, as well as related activism and politics
- Ur/urbanplanning ↗ 219,872 members · ~3.1 posts/day · since 2008
Urban planning aims to improve the built, natural, social, cultural, and economic aspects of cities and towns. This sub encourages thoughtful discussion of related topics, like transportation, land use, and community development …
- Cr/climatechange ↗ 128,431 members · ~18 posts/day · since 2009
This is a place for the rational discussion of the science of climate change. If you want to post about politics or climate policy, try /r/ClimateNews or /r/climatepolicy.
- Cr/ClimateOffensive ↗ 77,981 members · ~1.9 posts/day · since 2018
We're here to do something about climate change. We're not here to talk about why it's happening, how bad it is, or who to blame. We're here to brainstorm, organize, and act. Use this space to find resources, connect with others,…
- Er/environmental_science ↗ 66,840 members · ~4.9 posts/day · since 2010
This subreddit is for the *scientific discussion* of topics in the environmental sciences, geosciences, and other relevant discipline's; including papers, articles, research, public-policy, and both educational and professional a…
- Cr/climateskeptics ↗ 43,395 members · ~3.1 posts/day · since 2008
Questioning climate related environmentalism.
- Er/Environmental_Careers ↗ 39,002 members · ~12 posts/day · since 2016
A place to discuss careers and professional development related to environmental sciences and engineering, including compliance, permitting, assessments, remediation, and related fields. An emphasis is placed on career advice and…
- Cr/ClimateShitposting ↗ 32,443 members · ~2.9 posts/day · since 2021
Not so serious, very cynical shitposting about climate change, energy and the ecosystem implosion Expecting a minimum standard of shitposting or understanding of technology and economics. No deniers, nimbys, tankies, normies pls …
- Cr/ClimateMemes ↗ 30,453 members · ~2.6 posts/day · since 2019
The community to share environmental memes of prime quality. We advocate for climate action through funny captions and satire. Release your inner Greta, share your dankest decarbonization memes and raise global awareness to save …
- Er/Environmentalism ↗ 25,651 members · ~5.1 posts/day · since 2010
A focus on environmentalist action is the goal but more general discussion about environmental degradation or preservation is also welcome.
Choosing where to post
r/climate moves fastest, with about 32 new posts a day, so posts there get replies quickly but also slide off the front page within hours. Jokes and memes have their own home in r/ClimateMemes; the serious communities tend to remove them, so keep the two apart.
A simple rule of thumb: ask questions in the specialised communities and share your best finds in the big ones, where they can reach the most people. Always read the rules in the sidebar first — each community is run by its own volunteer moderators. Our guide to searching Reddit explains how to dig through any of these communities, and the subreddit info tool gives you the stats of one we don't list.
Frequently asked questions
Which environment and climate subreddit has the most members?
r/environment is the largest, with 1,558,129 members, followed by r/climate (237.2K) and r/urbanplanning (219.9K).
Where are the most new environment and climate posts?
By new posts per day, r/climate leads with about 32, ahead of r/environment (20). Counts are averages over the last seven days.
How many environment and climate communities are on this list?
We list 11 active, safe-for-work environment and climate communities with at least 25,000 members each, 2.5M members in total (people can be in several). Reddit has many smaller ones too; our guide on searching Reddit shows how to find them.
What is the oldest environment and climate subreddit?
r/environment, created on Jan 25, 2008.
Are these environment and climate subreddits safe for work?
Yes. Every community on this page is public and not marked 18+ by Reddit, and we filter out communities whose name or description points to adult content.
Data: Reddit's public subreddit search and the Arctic Shift archive (Nov 6, 2026), growth from SubMouse's weekly snapshots. Member counts of communities outside our Top 1000 come from the archive and can lag a little. Not affiliated with Reddit.