Teenagers today were born in the aftermath of a global financial crisis, are seeing war after war after war, grow up with the knowledge that the world is going to shit and the older generations aren’t willing to do anything about it. They see everyone pull up the ladder behind them, the ‘fuck you I got mine’ mentality is everywhere.
Not just teenagers (Alpha generation), but also GenZ and part of Millennials. I’m personally a Zennial (microgeneration between both GenZ and Millennials) and I feel the same as described in your comment: things are going worse everyday, most of the older generations (Gen X and Boomers) seems deadpanned about climate change, wars, economic crisis, and I’d also add broken dreams (lots of plans were destroyed because of things such as COVID pandemics, for example). It’s depressing to know that living will be worse and worse as the time passes.
It’s actually not nice, not for local wildlife, for example. Biomes exist for a reason and if anything changes abruptly, evolution can’t keep up with these changes, resulting in extinction of several species. Just like flowers are blooming in Antarctica, a rainy and green Sahara is as beautiful as a rose with thorns under its petals: really beautiful, but ominously dangerous.