May 04, 2005. /Lesprom Network/. Spanish pulp and paper manufacturer Ence expects to sell 80,000 metric tons of carbon dioxide emission rights this year. At the current price of - 16.22 per ton, Ence expects to take in - 1.3 million from the sale of its rights. Under the Spanish National Allocation Plan, Ence is entitled to 683,295 metric tons in emission rights, and expects to use only 89% of this.