Is burkitt lymphoma more commonly caused by exposure to toxins?

Yes. Yes, it is true. No clear hereditary /inheritance pattern in burkitt's lymphoma. Endemic lymphoma is associated with ebv infection. In HIV positive patients, burkitts lymphoma typically affects those with a relatively high cd4 count and no opportunistic infections.
Burkitts. Is uncommon, endemic in part of afrca, linked to ebstein barr virus. It is not genetic, toxic or familial.