AP: An environmental group that made a rare Republican endorsement when it backed Chris Christie for New Jersey governor last year said it has no buyer’s remorse now that Christie has raised questions about the cause of global warming. At a town hall meeting in Toms River this week, Christie said he needs “more science” before he’s convinced that human activity is responsible for global warming. While he did not challenge the voluminous science pointing to man as a chief culprit of global warming,…