According to estimates of the German Federal Statistical Office, there are currently around 1.2 million horses and ponies living in Germany. That is around four times as many as there were 40 years ago. We can therefore assume that there will be even more horses in Germany in the future.
According to the World Conservation Monitoring Centre, which gathers information on biodiversity, there are currently more than 60 million horses worldwide.
Saskia Blank of the Ideas 2020 team answered this question.