Many of these tasks could be hazardous when performed by children, according to the ILO.[11] Mixing and applying chemicals can be hazardous due to pesticide contamination,[16][19] especially because no protective clothing is worn during application.[18] Clearing vegetation and harvesting pods can be hazardous because these tasks are often done using machetes, which can cause incision.[16] This skill is part of normal development in children 15 to 17 years old, but is a higher risk in younger children.[18] Many have wounds on their legs where they have cut themselves.[20] Transport of the wet beans can also be hazardous due to long transport distances and heavy loads; hernias and physical injuries can occur.[18][19] The director of the Save the Children Fund described "young children carrying 6 kilograms (13 lb) of cocoa sacks so heavy that they have wounds all over their shoulders."[21]