However, claiming that environmentalists took down the whole Union is downright silly. Yes, the fears of the crumbling infra and coverups, Chernobyl nuclear disaster, Spitak earthquake, and Ufa train disaster dominated the media of the late USSR (and especially Armenia, due to the Spitak earthquake), but that was only a small factor, the reasons were much more fundamental.
This may be a tad exaggerated, and the main reasons were indeed much more fundamental, but the impact was massive. It was the coup de grace.
https://www.express.co.uk/news/world/1137086/chernobyl-hbo-s...
What do you mean? Glasnost (policy of open discussions) started in 1987, a year later than Chernobyl disaster and the coverup attempt.
- "The Phosphorite War (Estonian: Fosforiidisõda) is the name given to a late-1980s environmental campaign in the then-Estonian Soviet Socialist Republic, against the opening of large phosphorite mines in the Virumaa region[...] In Estonia it is regarded as a catalyst that led to the destabilization and dissolution of the Soviet government in Estonia.[3]"
https://en.wikipedia.org/wiki/Phosphorite_War
(I'm surprised this has never appeared on HN before in any context,
https://hn.algolia.com/?query=Fosforiidisõda&type=comment
https://hn.algolia.com/?query=phosphorite%20war&type=comment
Yes, environmentalist movements in 1989 were all across the country, and were significant. It was 2 years into Perestroyka and Glasnost [1] policy, and such things were not restricted from discussion, and 1989 was the year when a lot of non-CPSU new local politicians were elected in local councils and the soviet deputy council [2].
In my region, people would protest a projected Katun river dam [3]. It's not clear, whether the pressure stopped it, or financial shortages, but it was noteable -- at least I as 1st grader saw it discussed everywhere.
[1] https://en.wikipedia.org/wiki/Glasnost
[2] https://en.wikipedia.org/wiki/1989_Soviet_Union_legislative_...
[3] https://en.wikipedia.org/wiki/Katun_(river)