No matter how one looks at the Supreme Court's April 5 ruling on air pollution in Delhi, it is undoubtedly a milestone in Indian judicial history. After extensive hearing on all the nitty-gritty, the court used significant innovations of the law, such as health as a part of right to life and use of the polluter pays principle to penalise a polluting technology, to chart an exact course of action for a vacillating, evasive government. Legal experts share their opinions