New York, Nov 5 (JEN): With the “deadline” for concluding a universal climate agreement just four weeks away, Secretary-General Ban Ki-moon on Wednesday warned that despite months of talks and critical pledges on reducing greenhouse gas emissions, key issues still remain in play – on equity and differentiation, on finance and ambition – requiring world leaders to give clear guidance to their negotiators to seek compromise and reach a fair, universal deal at the upcoming UN climate conference in Paris. more