题目

Not many women have won the Nobel Peace Prize. Until 2004, no African woman ever had. That was when Dr. Wangari Maathai won it — for planting trees. You might ask, what do trees have to do with peace? “Many wars are fought over resources (资源),” Dr. Maathai said as she accepted the prize. “If we conserve resources better, the fighting will stop.” Dr. Maathai was born in Kenya in 1940. Unlike most African women, she went to school. High school woke up a hunger in her for more knowledge. She went to college in Kansas and earned a master’s degree in science from the Univers（a+1）（a-6）