Success and ROI shoudnt be measured only in figures (expenditure or pernoctations) in our current society we need to understand the role than environment and sustainability is playing. Some companies are using it as part of their marketing as part of their CSR.
But even those innitiatives are great there is a lot of work in our industry:
In Vigo the situation is not the same but:
Go to blackboard and explain your opion about sustainability in VIGO XMAS