The Real Reason Data Center Gas Power Plants Are So Dirty

Amazon has acquired a large off-grid power plant in Texas for a data center, potentially becoming one of the highest sources of greenhouse gas emissions in the US. However, the plant's environmental impact extends beyond its size; it will use less efficient gas turbines, which are being employed at other data centers across the US.

This choice could have significant implications for the environmental impact of artificial intelligence and the future of the US grid. The Texas plant is permitted to emit up to 33 million tons of greenhouse gases annually. Despite this, Amazon claims the plant will not raise electricity costs for Texas families and is committed to reaching net-zero emissions by 2040.

The plant will use simple-cycle turbines, which are less efficient than combined-cycle units, resulting in higher emissions. Simple-cycle turbines are becoming a more common choice for data center developers due to their quick installation and flexibility, but they are less efficient than combined-cycle units, releasing more waste heat.

Data centers, particularly those training AI models, require rapid power increases, making simple-cycle turbines suitable due to their ability to start up and shut down rapidly. However, this choice could lead to a parallel fossil fuel grid, threatening to generate millions of tons of greenhouse gas emissions if the demand for these technologies decreases.