The report also finds that environmental issues cause 5.2 billion days of illness annually and cost the equivalent of 17.6 percent of the country's GDP in 2019
The dead boy has been identified as Khaneshwar Tripura, 13, a student of Khagrachhari Model High School.
Additional Superintendent of Khagrachharhi police Enayet Hossain said a group of 8-10 students were on the truck in Charmile area around 9:30am on Tuesday when some picketers chased it.
Tripura fell from the back of the truck and died on the spot, he said.
The truck was seized and the driver detained, the police official added.
The United Peoples’ Democratic Front (UPDF), a regional political party, enforced the half-day road blockade in the hill district demanding release of one of its leaders on Tuesday.