Trading Emmissions, an AIM-listed investment company, has disposed of its holding in Chapel Street Environmental, as part of its current investment policy. The sale earned the group around £2.5m, which compares to a carrying book value in the last audited financial statements at June 30th of £2.3m. The transaction brings the total proceeds received from Chapel Street Environmental during 2012 to about £3.7m.The share price was unchanged by late morning.NR