> 1. Many of us lived through the 1960s and 1970s, when the government and scientists claimed we were heading into an ice age. Didn't happen.
I lived through the 60's and 70's and I do not recall ever hearing this. You're going to have to provide examples of this to bring me into this tent.
> 2. Many of us lived through the late 1970s and 1980s when the media and environmentalists claimed that Earth would be a lifeless rock by the end of the century due to deforestation. Didn't happen.
Again, I just don't recall ever hearing this.
I find 'many of us' to be a problematic phrase. You're making a claim beyond your personal experience using this phrase and it sure doesn't apply to me.
It may be your experience, and that's fine. But I'm not giving you a pass on claiming it was anyone's experience beyond your own.
I am interested in where you encountered these perspectives; I am aware I may be retro-fitting my own memories.
[edit: as per usual fixing mobile autocorrect and formating ]