OTTAWA — Canada's national pension fund manager is among a group of Canadian companies that are undermining the federal government's international anti-coal alliance by investing in new coal power plants overseas, an environmental organization says.Friends of the Earth Canada joined with Germany's Urgewald to release a report today looking at the top 100 private investors putting money down to expand coal-fired electricity — sometimes in places where there isn't any coal-generated power at the moment.The report lists six Canadian financial companies among the top 100 investors in new coal plants in the world.