It's not quite five in the morning and we're walking along a track in the forest. The moon is high in the sky and provides enough light for us to see where we are going. A wolf howls in the distance. We have come to Poland's Białowieża Forest, the last refuge of the European bison, in the hope of getting a glimpse of this greatly endangered animal in its natural habitat.
– it doesn't need to be set higher than 60 ºC. The same goes for the boiler of your central heating. Remember, 70 % of the energy used by households in the EU is spent on heating homes and another 14 % – on heating water.
More green tips