Much of the world’s web traffic is routed through data centers, which also fuel power-guzzling artificial intelligence (AI) applications. In the U.S. alone, data centers consumed around 4 percent of the country’s total electricity in 2023, and that number is projected to rise up to 12 percent by 2028.Some researchers are thinking big, formulating innovative schemes to make data centers more sustainable. Others, like Martin Karsten, a professor of systems and networking at the University of Water...