You’re not sure?
In a word: Greed. In two words: Crony Capitalism. The spend on “non-renewable“ energy is significant to the domestic economy. In 2023 (most recent year I could find), consumer spend on energy in the US was $1.6T (https://css.umich.edu/publications/factsheets/energy/us-ener...) with at least 82% of that being fossil fuels - the remainder being “renewables” and nuclear energy (https://www.eia.gov/todayinenergy/detail.php?id=62444). This does not include billions in subsidies and infrastructure investment.
“Going green” would threaten the American Greed Machine by cutting upwards of $150B in taxes annually, interfering with the individual, corporate, and government gains from the stock and commodities markets, causing short-term inflation due to commodity value spikes, and long-term deflation due to renewable energy being relatively very low cost to generate after the infrastructure is in place. Last, but certainly there is more, the US exports a massive amount of oil and gas. Divesting from fossil fuel production would have a significant impact on GDP (find your own source).
This is why the US doesn’t invest in infrastructure that doesn’t generate significant ongoing income like it once did - it simply doesn’t make enough money. We only act once it is falling apart.
It is all about the money, man. That money is power. It keeps the Corporatocracy and those at the top of it in charge, the US as the primary reserve currency and allows the US to have a huge, formidable military.