Canwest News Service: Even as American environmentalists and some politicians are trying to condemn Alberta’s oilsands as “dirty,” the world appears hungrier than ever for all forms of crude, after oil shot as high as $143 US per barrel Friday. After setting yet another trading record of $142.99, benchmark U.S. oil prices settled at $140.21 in New York, up 57 cents on the day. Analysts say $150 now seems all but inevitable. “I think $140 is sort of a psychological level, but it’s just …