U.S. President Barack Obama on Friday rejected the proposed Keystone XL oil pipeline from Canada in a victory for environmentalists who campaigned against the project for more than seven years. “The pipeline would not make a meaningful long-term contribution to our economy,” Obama told a press conference. He said it would not reduce gasoline prices, and shipping “dirtier” crude from Canada would not increase U.S. energy security. The denial of TransCanada Corp’s more than 800,000 barrels per day project will make it more difficult for producers to develop the province of Alberta’s oil sands. It could also put the United States in a stronger position at global climate talks that start in Paris on Nov. 30 in which countries will aim to reach a deal to slow global warming. U.S. Secretary of State John Kerry, who determined the pipeline was not in the country’s interest before Obama’s final decision, […]