By 2050, half the world's population could be affected by at least one allergy. Is global warming to blame? Find out more about rising pollen levels and one of the most allergenic plants in the world that is now also spreading in Germany. (This episode has been republished and updated).
Pollen season can already be miserable if you suffer from allergies. But climate change and the way it affects allergenic plants is only expected to make the situation worse, at the cost of our health and economies.