Economic decisions we make (especially we Capitalist-Bidness Types) should always include environment in our balance sheet considerations.  Here's why.  We didn't "make" the air.  We didn't make the "water".  We didn't even "make" the natural resources we use for our profit.  We borrow them and make them into something new.  It's OUR responsibility to borrow them wisely.  Don't you think?  I do.