في الأحد ٠٩ - أكتوبر - ٢٠١١ ١٢:٠٠ صباحاً
In her landmark 2010 book, Replenishing the Earth: Spiritual Values for Healing Ourselves and the World, Professor Maathai articulated four core values that guided the establishment and growth of the Greenbelt Movement, which she founded in Kenya in 1977: "Love for the environment; gratitude and respect for earth's resources; self empowerment and self betterment; and the spirit of service and volunteerism."