Bees are in danger. The diversity of the food we eat depends on them, and yet their population dwindles with each passing year. Apiculturist Henri Clement explains how bees work together to provide their priceless contribution to our planetary equilibrium thanks to pollination. But why are the bees dying? Is there a risk of extinction? How can we help? Our specialist provides young readers with effective actions that they can take: building a bed of plants, a beehive, etc.