Banks have choices when it comes to what projects they give loans to. Here are CEO names, emails, and phone numbers of those supporting the pipeline.
Click on this link:
http://www.yesmagazine.org/people-power/how-to-contact-the-17-banks-funding-the-dakota-access-pipeline-20160929
Here is another excellent article that gives a thorough background:
Who's Banking on the Dakota Access Pipeline?
The article is at this link: http://www.foodandwaterwatch.org/news/who's-banking-dakota-access-pipeline