Cacao plants are cultivated in a very narrow strip on the globe: they grow only around the equator, in places that have relatively stable temperature and humidity during the year. But in the next few decades, the climate of these regions is expected to become warmer and dryer, leaving the cacao nowhere to be grown. Giant chocolate companies like Mars are working with scientists to find solutions, like making GMO cacao plants able to withstand these conditions, but we are certainly reaching the end of chocolate as we know it.