CanWest News Service: Canada can achieve deep cuts in the amount of heat-trapping gases it is pumping into the atmosphere if it toughens up its own domestic plan with measures such as a carbon tax and a cap and trade system to combat harmful economic activity, a federal advisory panel said Monday. In a new report, the National Round Table on the Environment and the Economy concluded that Canada could achieve a 65 per cent reduction in greenhouse gas emissions by 2050 by acting as soon as possible. …