 Canadian industry has started to supply major components for Wind Tower projects, Mitsubishi Hitachi Power Systems Canada, Ltd. being one example.In a survey conducted by Angus Reid Strategies in October 2007, 89 per cent of respondents said that using renewable energy sources like wind or solar power was positive for Canada, because these sources were better for the environment.Only 4 per cent considered using renewable sources as negative since they can be unreliable and expensive.