Hundreds of world leaders, government officials, and their entourages are in Paris this week for the Cop 21 climate summit in Paris, collectively striking a huge blow against the goals of the meeting.

According to a calculation by Wired, about 50,000 people are expected to travel to the summit producing as much as 300,000 tons of carbon.

President Obama is also expected to contribute a substantial portion of carbon to the world’s atmosphere by traveling to Paris. According to calculations by the Daily Caller News Foundation, Obama’s flight to Paris likely emitted roughly 189 tons of carbon alone.

During his speech at the Paris climate change summit, Obama blamed America for contributing to the problem of climate change and vowed to do more to prevent it.

“I’ve come here personally, as the leader of the world’s largest economy and the second-largest emitter, to say that the United States of America not only recognizes our role in creating this problem, we embrace our responsibility to do something about it,” he said.