For example, improved energy-saving cooking stoves, which use less firewood than traditional stoves, were introduced in Rwanda in 2000 in order to preserve trees and the environment. Now Rwandan peacekeepers have brought such stoves to Darfur, where women and young girls live in fear of getting raped every time they venture outside camps for internally displaced persons or their villages to collect firewood for cooking. Apart from saving the lives of women who risk being raped or killed while collecting firewood, the improved stoves also allow troops and police who were previously escorting them to focus on other mandated tasks. Rwandan peacekeepers have also built classrooms and clinics, planted trees in Darfur, and led community clean-up programmes in several Haitian towns that have since become permanent fixtures.