The United Nations issued the most Certified Emission Reduction carbon offsets in more than six months, according to UN data compiled by Bloomberg.

The executive board of the UN’s Clean Development Mechanism, the body responsible for regulating CERs, delivered more than 6.3 million metric tons of credits to the market today, the UN data show. That’s an increase of 1.7 percent from yesterday and the biggest issuance in a single day since May 2.

CERs for December fell as much as 7.3 percent to 1.01 euros ($1.30) a ton on London’s ICE Futures Europe, and were at 1.06 euros at 10:26 a.m.

To contact the reporter on this story: Alessandro Vitelli in London at avitelli1@bloomberg.net

To contact the editor responsible for this story: Lars Paulsson at lpaulsson@bloomberg.net