tldr: Green transition, like switching to electric vehicles and use renewable energy sources, requires a huge amount of minerals. One of the main sources of these minerals is African continent. Researchers found big overlapp of that mining with areas of big apes. Almost 200.000 of apes are in a risk area, based on the estimation:

We estimated that more than one-third of the entire great ape population in Africa—nearly 180,000 individuals—could be directly or indirectly threatened by mining now and in the near future. Apes in West Africa could be most severely affected, where up to 82% of the population currently overlaps with operational and preoperational mining locations and their 50-km buffers

Another problem is that mining companies working there are not pay attention to ecological consequences of their business:

only 5% of the 400 assessed companies had carried out science-based nature and biodiversity impact assessments of their operations and business models