Any trade agreements signed by soon-to-be-President Barack Obama must “[preserve] the planet we all share,” the president-elect declared Friday. Chief trade negotiator nominee Ron Kirk concurred: “[A] values-driven agenda that stays true to our commitment to … environmental sustainability is not only consistent with a pro-trade agenda, but it’s also necessary for its success.” Obama previously promised to work with Mexico and Canada to add stronger labor and environmental provisions to NAFTA.