...[Children] suffer the effects of nicotine exposure as they labor in U.S. tobacco fields. There is not an exact figure for how many children work in America's tobacco fields, but Human Rights Watch interviewed nearly 150 [children]...Nearly 75%...interviewed reported...symptoms -- nausea, vomiting, loss of appetite, headaches, dizziness, irritation and difficulty breathing. These are symptoms of acute nicotine poisoning...Exposure to pesticides from adjacent fields and accidents with sharp tools are also common...Altria, one of the biggest cigarette makers, did not immediately comment on the report when contacted by CNN. The study focused on…North Carolina, Kentucky, Tennessee and Virginia...Children can legally work in the tobacco fields…These children primarily work during the summer to help support their families. The majority of them were Hispanic children of immigrants who lived in nearby towns…