Google’s parent company is letting the air out on a project to provide more remote areas with internet access using massive balloons after the project was unable to reduce its sky-high costs.

Alphabet launched Loon in 2011 to connect the 3.8 billion people who, by Loon’s estimate, live in hard-to-reach areas where internet providers have found it too cost-prohibitive to install traditional ground-based network systems. The project relied on sending gas-filled polyethylene balloons as large as tennis courts more than 60,000 feet into the sky, according to the Wall Street Journal.