Assume that, if you undertake the project, you can alternatively install a different energy system that is more environmentally friendly $($such as solar$)$ that requires an incremental investment of $$59$ million $($after tax credits and depreciation tax shields$)$ and is expected to initially lead to incrementally lower energy costs $($that reduce after$-$tax cash outflows by $$4$ million per year for the first $6$ years of the project and are expected to reduce after$-$tax cash outflows of $$7$ million per year from year $7$ through year $25$ of the project$).$ Compute the incremental NPV of this alternative energy system

Evaluate any ethical considerations involved in making the decision in $d\mathrm{.}13.$