what is collapsing is the planetary ecosystem, thanks to industrial practice. Especially in North America suburban sprawl and industrial agriculture and waste have eaten into and degraded what was very recent a deep well of ecological wealth. I would call this a major impact on the American culture which built it's identity around that seemingly boundless wilderness, and as well our basic human psyche and culture for which (many argue) proximity to deep ecological process is a fundamental need.
The consumer culture and consequent wealth of things, especially images and meditated simulcra, really only echo the naive American soul in a wasteland of it's own making. All cultural realities are fundamentally ecological. We fill our lives with artificial realities so liberally because we are born into a culture that took massive wealth of natural resources and the experiences they provide for granted. As they vanish, we fill the gap with artificial things and experiences.
It's a dangerous game with potentially grave and unexpected consequences, and we have played it before many times on a much smaller scale: hunting food sources to extinction, turning rich farmland into desert, etc.
It seems that the collective human psyche it's unable to reflect accurately on the consequences of it's own actions with respect to our fundamental biogenic foundation.
Take for example the flooding of our nights with artificial blue spectrum light pollution. In evolutionary terms, this is a new event. For billions of years nights have been uniformly mostly dark with a regularly variating moon glow. Suddenly we change all that and dark nights are a thing of the past. Nevermind the massive affect on a whole ecosystems, nevermind studies that show a severe affect on the human psychological health, status quo says lighting up the night is normal, good, and safe.
And there are shootings at schools and terrible crime and massive loss of insect life and songbirds dying off and these quite extraordinary changes to the continuity of our bio systems and our lifestyles, and yet we don't see the connection. We blame the media or Donald Trump or the 1%. We don't see the problem as something we have direct control over. We blame our institutions or leaders or gods or what have you, anything but ourselves, and anything to avoid changing our lifestyles and behaviors.
So imo things really are falling apart, just not the things we think.