Complex sentence: The western border is the Esoit (Siria) Escarpment of the Great Rift Valley, and wildlife tends to be most concentrated here, as the swampy ground means that access to water is always good and tourist disruption is minimal.
Split into simpler sentences: The western border is the Esoit (Siria) Escarpment of the Great Rift Valley. Wildlife tends to be most concentrated here, as the swampy ground means that access to water is always good, while tourist disruption is minimal.