Should economic factors ever single handedly prevent or permit a project? Why or why not?

Economists and environmentalists are often on opposite sides of the debate when discussing the impacts caused by human interaction. As discussed in your readings, when developing an Environmental Impact Statement (EIS), the direct and indirect economic impacts are heavily considered. Should economic factors ever single handedly prevent or permit a project? Why or why not? Additionally, within your post, make sure to discuss which of the various components of economics discussed in Chapter 7 you believe are the most important when conducting an EIS and detail why you feel this way.