Yeah yeah yeah, OP - so what, exactly, over the last few decades have you actually personally done to help the planet?
I'll tell you what I (and we as a family) have done. We don't buy out-of-season tropical fruit and veg, we buy local in-season produce from the farm shop, and UK-grown in the supermarket whenever possible.
We buy eggs from a stall up the road, whose free-range chickens we can see in the fields from our bedroom window.
We buy local honey, and have a bee-friendly garden. We don't use pesticides in the garden, and we also grow as much fruit, veg & herbs as we can. We have a mini-pond and a resident toad. And a compost heap.
Over the last 5 years or so I have personally planted well over 200 trees, some of which I grew from seed, and most of which are native species. I also volunteer at a local community tree nursery, where we propagate thousands of trees and endangered native wild flowers.
I've belonged to the RSPB for over 30 years, and the Wildlife Trusts for nearly as long. I have written stern letters about animal welfare to supermarkets.
I am a perpetual thorn in the side of our town council, over their insistence on mowing grass verges instead of leaving them for wild flowers, for constantly trimming hedgerows and destroying wildlife habitats, and for allowing fuckwitted developers to build endless housing estates on floodplain.
I have campaigned against increased air traffic at Luton Airport, against HS2, against the massive housing developments around here which are swallowing up the countryside with houses that local people can't afford, and which are now mostly bought by commuters.
I haven't been on a plane since 1996.
When our district council introduced recycling, I was on the Residents' Panel, and among other local people we advised the councillors what needed to be done. They listened, and our district council has for some time had the highest waste recycling percentage in the country.
We sent our dc to the nearest schools and they walked there.
As a family we recycle everything we can, and avoid buying food with excess packaging wherever possible. We re-use and repurpose everything we can. Hell, we even use the paper from cut-up old envelopes for shopping lists.
But one thing I haven't done is to antagonise thousands of people and waste taxpayers' money and precious police time by chaining myself to some fucking railings.