In the first 11 months of 2012, Hue received 2.4 million visitors, an increase of 24.6% from the same period of 2011. 803,000 of those 2.4 million visitors were foreign guests, an increase of 25.7%. Although tourism plays a key role in the city's socioeconomic development, it also has negative impacts on the environment and natural resource base. For example, services associated with tourism, such as travel, the development of infrastructure and its operation, and the production and consumption of goods, are all energy-intensive. Research by the Climate and Development Knowledge Network has identified traditional 'garden houses' as having the potential to increase tourist traffic and revenue. Apart from the environmental, economic and cultural benefits provided by garden houses, their promotion could pave the way for other low carbon development initiatives.