For The Festive Lover: The festival of Diwali involves lighting of wax lamps, candles and earthen diyas with cotton wicks dipped in vegetable oil. On burning, these produce harmful gases like carbon dioxide, but Maharashtra based ‘Zero Brand Zone' has a solution to this - diyas made of cow dung. Made using traditional mixture ‘panchgavya' which involves five products of cow - dung, urine, milk, curd and ghee and natural binding mixture of cow butter, neem, peepal and lemon tree leaves, eco-friendly diyas burn away along with wick, leaving zero toxic gases. The green diyas come in two variants - with ghee (Rs. 4 per piece) and without ghee (Rs. 8.75 per piece) and can be purchased from the official website of Zero Brand Zone.