I grew up in a Fundamental church. It was an Independent Baptist and their beliefs are very similar to the Duggars. About the only difference is that the group we were in didn't promote huge families. Anna and Josh were married in an Independent Baptist Church. I looked it up once. They go for all the Duggar rules, separation from the world, narrow minded, no focus on education, no encouragement for females to excel, men rule, etc.
I still have family who are in that church, although some of them have evolved, but not much. They do not believe in saving the planet by recycling. I think it has to do with what they think the Bible says about earth in the end of time. They don't believe in global warming either. So, using all the earth's resouces is not a problem for them. This is from my own knowledge and experience with these people.