**2. Methodology**

This chapter was aimed at analyzing the effect of climatic changes on ecosystem services provided by the tropical and subtropical forests. The chapter has also been designed to highlight the conservation measures necessary to be taken to ensure sustainable supply of the ecosystem services. Therefore search of literature covered broadly two main issues; the effect of climate change on Ecosystem services of the tropical and subtropical forests and the conservation efforts to save the natural systems. Peer-reviewed journal articles, books and reports were collected from trusted websites and publishers. The key words used during the search were 'ecosystem services, changing climate, conservation efforts, tropical and subtropical forests, precipitation, warming, CO2 extreme, provisioning, regulatory, supporting and cultural services'. Boolean operators and truncations were used during the search of key words. Once the relevant literature was searched, it was thoroughly reviewed and analyzed and then presented in this chapter.
