Brits have been warned about the important health dangers of using wood-burning stoves in a bid to cut costs on central heating.
Sales of stoves using wood have soared, with more than 1.5 million used in the UK. Many people think that timber logs are a renewable fuel, so better for the environment.
But the reality is that they're not so green-friendly, as trees are not being planted at a rate to keep up with the amount of CO2 released by burning them.
