B.natural resources are abundant for people to use
C.students should be taught to be responsible for the world
D.everyone should make efforts to change the positive nature
65.What’s the writer’s purpose of writing this passage?
A.To criticize the traditional education system.
B.To encourage the students to adopt healthy eating.
C.To inspire people to recycle waste from the cafeteria.
D.To arouse the schools to take action to protect the earth.
C
A new study in West Africa shows how farm irrigation systems powered by the sun can produce more food and money for villagers.The study in Benin found that solarpowered pumps are effective in supplying water,especially during the long dry season.
SubSaharan Africa is the part of the world with the least food security.The United Nations Food and Agriculture Organization estimates that more than one billion of the world’s people faced hunger last year.Around 265 million of them live south of the Sahara Desert.Lack of rainfall is one of their main causes of food shortages.
Jennifer Burney from Stanford University in California led the study.The research team helped build three solarpowered drip irrigation (滴灌) systems in northern Benin.Between 30 and 35 women used each system to pump water from the ground or a stream.Each woman was responsible for farming her own 120 square meters of land.They also farmed other land collectively.
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