Say no if you are in favour of freezing and starving in the dark. Because it is petroleum products that are mainly responsible for feeding a 7 billion world population through the production of fertilizer, chemicals, and energy to power farm equipment that produces the food and transports the food to a population around the globe that likes to eat. Not to mention heating in winter and cooling in summer. .Say no if you’re in favour of (I’ll take a wild-assed guess) of about one third of that 7 billion population perishing without the products from petroleum.. Say no to the Keystone pipeline if you’re in favour of the third largest reserve of petroleum on the globe going to Asia rather than staying in North America. .Say no to the transport of petroleum via pipeline if you’re in favour of transporting the petroleum to market by less environmentally friendly and hazardous methods such as by rail, barge, and truck. Because one way or another the petroleum will get to market. .Say no to the oilsands that if all were burned would increase global temperature by about .36 degrees C., but if all the coal were burned would increase global temperature 15 degrees C. (Computer modelling by two climate scientists and published in the respected scientific magazine “Nature.”) .So if you are really serious about greenhouse gasses and emissions, go after coal production that is responsible for 40% to 50% of electrical production in the U.S., 80% in China, and 70% in India. It’s just possible that a little hunger, a little freezing, and a little sweltering just might change the outlook of a lot of well-meaning but unrealistic self-proclaimed environmentalists.