1, Household Tourism The OECD examined the trends, environmental impacts and policy responses to household tourism travel as part of their program on sustai found that tourism contributes to environmental degration through transport related emissions, impacts on biodiversity and depletion of or damage to natural resources. Further, the extent of degration depends on various travel factors. Some options recommended for reducing the environmental impact of household tourism travel a change in perception of holidays; use of technology that improves the environmental performance of transport: transport demand management; economic instruments and travel policies.