Gas leaks can be a very dangerous and costly problem – even small leaks can be dangerous to your health and increase the cost of your gas bill. Gas leaks can often result in a sulphur-like odour, but this is not always the case – other indicators include an increase in your gas bill, hearing a hissing sound near pipes and appliances, or noticing dead patches on lawns or gardens near your utility lines. It is important to treat potential gas leaks as a gas leak emergency and contact a licensed professional immediately.