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Make it a rule never to give a child a book you would not read yourself.

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

天然氣是一種多功能燃料，可以在沒有陽光和風的時候提供可靠性，從而支持可再生能源的增長。