Google has signed the first U.S. corporate power purchase agreement involving natural gas with carbon capture, marking a major shift in how Big Tech plans to fuel the data-hungry future of artificial intelligence. The deal centers on the Broadwing Project, a 400-megawatt gas-fired power plant planned for Decatur, Illinois, developed by privately held Low Carbon Infrastructure. The plant will capture and store about 90% of its carbon dioxide emissions in underground wells 5,000 to 7,000 feet deep. Power will flow to Google’s expanding network…