今日の読み物　レベル17

◇英検準１級の読解問題から

Energy: Choices for Development and Environment
Energy is necessary for daily survival. Future development crucially depends on its long-term availability in increasing quantities from sources that are dependable, safe, and environmentally sound. At present, no single source or mix of sources is at hand to meet this future need. ...レベル17 [英検準１級]