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Why Green Skyscrapers are a Terrible Idea – Adam Something
(www.youtube.com)
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:

How much each change to the atmosphere has warmed the world:

Recommended actions to cut greenhouse gas emissions in the near future:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.
I have no idea. Not an architectural engineer.
My assumption would be that they have to build the building to a code that has a minimum weight requirements.
Male Humans are generally averaging about 80kg.
If you have a party and have 10 - 15 over. That's a lot of weight. Not all the time but I think if every apartment had a few plants then the weight would still be less than having a party.
Or that was my assumption anyway. I know balconies have a weight limit, as there was a story about a party and too many people were out on it and it collapsed