What makes Wangari Maathai's approach to Kenya's economic problems such an effective long-term solution?

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

Iceland has taken advantage of its geology to meet a. political needs b. energy needs c. cultural needs d. economic needs answer b. energy needs

In which horizon of soil profile is prevent material usually found