One of the undesirable aspects of tourism development is environmental degradation in destinations. Firstly, more and more natural resources such as water, energy, and soil are exploited due to the increase in visitor numbers, which may lead to the depletion of local resources. Secondly, pollution is also a serious issue making the authorities worried. Obviously, beverage bottles or cans and plastic bags are freely disposed of at the tourist sites, posing a threat to the natural environment. Besides, the growth of vehicles to meet travel demand accidentally triggers or worsens traffic congestion, air and noise pollution in the overcrowded regions. Another bad influence of tourism is the devastation of the wildlife. The habitats of many wild plants and animals have been gradually lost because of building hotels, resorts and recreational zones. In brief, these negative impacts on the environment will be more serious if there are not appropriate measures.