Hidalgo, who is against countries bringing their own units, stressed earlier this year that Paris organizers would not change course.

“I think we have to trust science on two counts,” she said. “The first is what scientists are telling us about the fact that we are on the brink of a precipice. And secondly, we have to trust the scientists when they help us to construct buildings in a sober way that allows us to make do without air conditioning.”

France has the highest percentage of nuclear power of any power grid in the world and its electricity is generated emitting a very low level of carbon dioxide.

https://ourworldindata.org/grapher/carbon-intensity-electricity

According to this, France emits about a seventh the carbon dioxide per unit of power generated as the US does. We can use seven times as much electricity in Paris as back in the US and still have about the same carbon dioxide emissions.