“绿色化学”是21世纪化学的主导方向，下列措施中符合“绿色化学”的是

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                                                                                                             西   楼^①
                                                                                                               曾 巩
                                                                                    海浪如云去却回，北风吹起数声雷。
                                                                                    朱楼四面钩疏箔^②，卧看千山急雨来。
                                                 注：①西楼，即诗中的朱楼，它依山面海。②钩珠箔，把帘子挂起。