Liberal Leader Justin Trudeau pledged Monday to spend $1 billion over a decade to protect and restore Canada’s big lakes and river systems, as he again sought to paint a stark contrast between his party’s environmental record and that of the Conservatives. A re-elected Liberal government would also build on its budget commitments by fully funding the creation of a new Canada Water Agency to co-ordinate freshwater initiatives, with a launch set for next year, Trudeau said.