For mining industries, the most frequent problems they are facing are usually about the environment, if their plans or actions will cause damage to the environment. Governments’ regulations related to environmental protection always become a great threat to those companies. Taseko’s megaproject would increase Taseko’s revenues by nearly 200% over 2014 levels. However, First Nation’s tribal park plan obviously became a big obstacle for this company. So, for this company, they will need to reconsider about their business plan because of this threat. From this case, I realize that external effect like this have great influences on the companies. the cost has increased a lot in order to minimize the damage to environment, and Taseco has changed the plan over and over again. So, this external effect caused the company to take more steps to implement their plan, and Taseko had to pay more than first budgeted.