With respect to the government’s efforts to improve or upgrade the Victoria-class submarine fleet so that the ships are more environmentally friendly: (a) what projects are currently underway by the Navy to ensure that the diesel engines used by the Victoria-class submarines will produce less amounts of harmful pollutants; (b) has the government made any efforts or conducted studies to find suitable alternative fuels for the diesel engines to make their emissions less harmful; (c) has the Navy succeeded in retrofitting the submarine fleet with appropriate air conditioning and other refrigerant systems so that they will be ozone friendly and, if so, what was the total cost of these improvements; (d) what is the current deadline of the Department of National Defence to replace ozone depleting substances on the Victoria-class submarines; and (e) what other improvements or upgrades are planned for the Victoria-class submarines to make them more environmentally friendly and how much has the government budgeted for these improvements?