Ow can the hotel Marriott Management Board implement ecological strategies in order to comply with sustainable development

aim and objectives , litterature review, research methodology,reference list.
Objective 1: Review the theory of ecological management, what Marriott Hotel chain is doing now.
Objective 2: Use of a case study of Marriott (What is it doing in terms of green practices? How much do they invest? (water, money saved)
Objective 3: Case study of other hotel chains (Accords, Hilton, Ritz Carlton) –> How do they implement environmental management

Methodology: Data collection should be linked to the objective theories