To Warren Sarauer putting a solar electric system on his roof was a no-brainer but when some innovative electricity retailers in Alberta decided to offer almost double the going rate for his exported solar energy he was ecstatic. Sarauer is a big solar energy supporter - through his company Evergreen and Gold Renewable Energy he puts renewable energy systems into people's homes. But last year he tackled a project that would set an example for his clients, he built a net-zero office.