Mercury in low-energy lightbulbs

Even in the summer, you’ll probably end up with the lights on every now and then. And, if you’re concerned about the environment, you might be using energy-efficient lightbulbs. But if you are, make sure that you’re using either LED-based ones, or ones carrying the European Eco-label, as otherwise you may have bulbs with high levels of mercury in them that are so poisonous you can’t dispose of them with the regular rubbish.