Maintaining clean, safe water remains one of our greatest national and global challenges and responsibilities.

Maintaining clean, safe water remains one of our greatest national and global challenges and responsibilities.

保持清洁、安全的水仍然是我们面临的最大的国家和全球挑战和责任之一。

-- Jerry Francis Costello 杰里·弗朗西斯·科斯特洛