Reuters: The Netherlands and the Tanzanian arm of Canada’s Artumas Group Inc have signed a carbon offset deal for 200,000 tonnes of greenhouse emissions to run for seven years, its embassy in Tanzania said. AG&P Power Ltd, the Tanzanian branch of Artumas, discovered a gas deposit in Mnazi Bay in Mtwara, southeastern Tanzania, and is already using part of it to generate some 5 megawatt (MW) out of a 12 MW plant it has installed in the area. The Oslo, Norway-listed oil and gas firm …