求帮忙翻译一下这些英文句子qwq在线等啊谢谢！

1. Scientists' call for a revision of policy 科学家们呼吁修订政策 2. An explanation for reduced water use 解释减少用水的原因 3. How a global challenge was met 如何面对一个全球性的挑战 4. Irrigation systems fall into disuse 灌溉系统逐渐被淘汰 5. Environmental effects 对环境的影响 6. The