Why a German pesticide maker sacrifices profits for being nice to insects

A philanthropic German business owner makes his money selling insecticides, which he campaigns for people not to use in order to protect biodiversity. Why?

source https://www.dw.com/en/why-a-german-pesticide-maker-sacrifices-profits-for-being-nice-to-insects/a-74869659?maca=en-rss-en-ger-1023-rdf