The county government of Kiambu has urged stakeholders to support the tree-planting initiative launched by President William Ruto.
Water and Environment CEC David Kuria said most urban areas rely on water from rivers and boreholes.
He said trees from the water sources were cut down many years ago without being replaced, leaving the wetlands at risk.
However, he said efforts to conserve them has seen forests being replanted with indigenous trees.
Kuria said so many residents in urban areas don't know the sources of the water they drink and urged the government to continue sensitising them on the importance of conservation.
“So many people living in Nairobi and other urban areas don't know the sources of the water they drink. They should visit the forests and learn,” he said.
He spoke at Uplands forest where he represented Governor Kimani Wamatangi during the launch of the national tree-planting campaigning Wednesday.
He was accompanied by Uplands forester Isaac Waweru, Kiambu chief conservator Thomas Kiptoo, Kiambu county commissioner Alfred Mkangi and Lari deputy county commissioner Samuel Kariuki.
Others were MCA’s Nyutu Wamwere (Kijabe), Josphat Kinyanjui (Lari Kirenga), Lari MP Mburu Kahangara and PS’s Njoroge Gathecha (Public service) and Josephine Mburu (health).