The house with three kitchens, a 12-nozzle shower for two and a tiled washing station for one lucky dog is designed as a "net-zero" energy home.
LNG is proving popular as a "bridge fuel" while countries transition from coal and oil to renewables.
By one estimate, the pledges out there already would require a forest five times the size of India.
It's a market-focused alternative to carbon taxes.
It needs more public investment, too.
The country is criticized for doing too little, too slowly, but efforts are already having an impact.
The tax has been a contentious topic among Washington lawmakers, but the U.S. is behind industrialized nations in not having one in place.
If you can't pollute less, pay someone else to pollute less for you. Carbon offsets sound simple but are complicated in practice.
New fuels, new policies would be needed soon to meet the goal of net-zero carbon emissions by that date.
China has more than enough coal underground to service the country's needs.