Breathing easy: Is an expensive air purifier necessarily more effective?
With the onset of winter bringing its usual pall of pollution-related gloom over the skies in North India, the conversation in Delhi, the second-most polluted city in the world, returns to the question of how to tackle pollution, indoors and outdoors. Over the past two years, this concern has resulted in a thriving market for air purifiers in the national capital. With the onset of winter bringing its usual pall of pollution-related gloom over the skies in North India, the conversation in...