CNN: Warren Buffett just injected himself into one of the hottest environmental debates in the country.
On Thursday Buffett's Berkshire Hathaway (BRKA, Fortune 500) announced through a regulatory filing with the Securities and Exchange Commission that it bought $524 million worth of Suncor stock last quarter.
Suncor (SU) is a Canadian oil company that derives most of its current oil production -- and future expansion plans -- from Alberta's oil sands.
Preventing oil sands expansion is the main...