By Riaz Sohail
BBC Urdu service, Thatta
The trees were planted in a swampy mangrove region
A team of volunteers in Pakistan has set a new world record by planting more than half a million trees in one day.
Guinness World Records confirmed that 541,176 trees had been planted in the southern province of Sindh on 15 July.
Some 300 volunteers, working in groups, planted mangrove saplings in the 750 acres of the Indus river delta region.
They beat the previous team record for tree planting which was set in India just last month when 447,874 saplings were planted in Assam state.
Pakistan's tree-planting marathon was witnessed by representatives of Guinness World Records and the International Union for the Conservation of Nature.