A Japanese government website crashed Wednesday as people visited the site to take advantage of a McDonald’s offer for a half-price Big Mac in exchange for pledging to fight global warming, AFP reports.

People had to download a form from the environment ministry’s website and check off ways they would reduce carbon dioxide emissions.

McDonald’s is one of more than 80 companies offering goods or other prizes to help the government’s drive to reduce greenhouse gases – none of the other corporate offers crashed the system.

Most visits were just after 9:00am which, according to a ministry official, indicates that many people were thinking about Big Macs as they started work.