Why does the blending of many different disciplines present both challenges and opportunities to environmental scientist?

The blending of different disciplines like geology, biologists, hydrologists and foresters can present both challenges and opportunities to the environmental scientist. The discipline like geology can involve someone used to mining and the destruction of ecosystems like mining down through lakes in open pit mines which is detrimental to the environment, but on the other hand the geologist can choose the best soil for growing grass on to feed the wild deer and moose on the reclaimed waste dumps, for example.