Age: EUROPEAN Union leaders have pledged to stick to a costly plan for deep cuts in greenhouse gas emissions, saying the crisis in global financial markets must not deter efforts to combat climate change. After presiding over a two-day summit, French President Nicolas Sarkozy said that, despite misgivings about costs, “climate change is so important that we cannot use the financial and economic crisis as a pretext for dropping it”. He had warned leaders of the 27-nation EU they …