On Monday, Mayor Patrick Collins of Cheyenne, Wyoming, announced plans for an AI data center that would consume more electricity than all homes in the state combined, according to The Associated Press. The facility, a joint venture between energy infrastructure company Tallgrass and AI data center developer Crusoe, would start at 1.8 gigawatts and scale up to 10 gigawatts of power use.

The project's energy demands are difficult to overstate for Wyoming, the least populous US state. The initial 1.8-gigawatt phase, consuming 15.8 terawatt-hours (TWh) annually, is more than five times the electricity used by every household in the state combined. That figure represents 91 percent of the 17.3 TWh currently consumed by all of Wyoming's residential, commercial, and industrial sectors combined. At its full 10-gigawatt capacity, the proposed data center would consume 87.6 TWh of electricity annually—double the 43.2 TWh the entire state currently generates.

Because drawing this much power from the public grid is untenable, the project will rely on its own dedicated gas generation and renewable energy sources, according to Collins and company officials. However, this massive local demand for electricity—even if self-generated—represents a fundamental shift for a state that currently sends nearly 60 percent of its generated power to other states.

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The final bill is largely what emerged from the Senate Finance Committee in mid-June.

China has been installing renewable energy at a spectacular rate and now has more renewable capacity than the next 13 countries combined, and four times that of its closest competitor, the US. Yet, so far at least, that hasn't been enough to offset the rise of fossil fuel use in that country. But a new analysis by the NGO Carbon Brief suggests things may be changing, as China's emissions have now dropped over the past year, showing a 1 percent decline compared to the previous March. The decline is largely being led by the power sector, where growth in renewables has surged above rising demand.

This isn't the first time that China's emissions have gone down over the course of a year, but in all previous cases the cause was primarily economic—driven by things like the COVID pandemic or the 2008 housing crisis. The latest shift, however, was driven largely by the country's energy sector, which saw a 2 percent decline in emissions over the past year.

China's emissions have shown a slight decline over the last year, despite economic growth and rising demand for electricity. Credit: Carbon Brief

Carbon Brief put the report together using data from several official government sources, including the National Bureau of Statistics of China, National Energy Administration of China, and the China Electricity Council. Projections for future growth come from the China Wind Energy Association and the China Photovoltaic Industry Association.

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