There really wasn't. The person you replied to covered as much. They had the opportunity for a few big bills, which they did - much of it ultimately stemming from concerns around climate change.
I mean, it is about as subtle as a middle school student or someone wearing a suit+tie on subway. I would notice them, but absolutely nobody would mind or care about it.
People holding their phone up get pretty much the exact same treatment. I.e., being something that you would notice, but pay no mind to it as being something entirely unremarkable.
Individuals can of course make choices to reduce their emissions, Americans more than most since they're starting higher. Buy less new stuff, eat less meat, fly less, etc.
But policy is where real change needs to be made, and the effects of policy still scale with population in most cases.
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