"Let not a single drop of rain water be allowed to reach the sea without benefiting mankind"

Silva, E.I.L.2023-02-062023-02-062004School Science Programme - 2004 Course Notes:p.12-18https://dl-ifs.nsf.gov.lk/handle/1/2159"Let not a single drop of rain water be allowed to reach the sea without benefiting mankind" - myth or reality ?Conference Paper