Christian Meyer carefully moves a file up and down a bamboo tube. Fine shavings trickle onto the floor of the Bethel workshop, where the man with a mental illness is busy making nesting aids for wild bees and wasps. "I like doing something productive," says the 51-year-old, "and I think it makes sense to do something about insect extinction."
Wild bees and wasps ensure the diversity of nature by pollinating plants. They also regulate the balance of nature by eating caterpillars, mosquitoes and spiders, for example. However, these agile creatures are endangered. This is why measures to protect them, such as the construction of nesting aids, are so important.