No, the US is not "doing something about it" and it is clear from the article:
> For a time, US emissions continued to decline modestly despite the Trump administration’s environmental vandalism; the inexorable forces of the market meant that aging coal-fired power plants continued to be replaced by cheaper, cleaner, newer, and more efficient plants powered by natural gas and renewables. But growing carbon dioxide emissions due to industry and transportation have more than offset this progress, leading to an estimated 3.4 percent growth in US emissions in 2018.
Compare that with, if I understand correctly, every single country that signed the Paris deal, who did not decline modestly, even for a time. The US might well be considered to be "doing something about it".
No, the US is not "doing something about it" and it is clear from the article:
> For a time, US emissions continued to decline modestly despite the Trump administration’s environmental vandalism; the inexorable forces of the market meant that aging coal-fired power plants continued to be replaced by cheaper, cleaner, newer, and more efficient plants powered by natural gas and renewables. But growing carbon dioxide emissions due to industry and transportation have more than offset this progress, leading to an estimated 3.4 percent growth in US emissions in 2018.