Chevron...is drawing harsh criticism for its business ties to Burma...Human rights activists are calling on the company to either leave Burma or persuade the country's military rulers to stop killing demonstrators...Some are calling for a boycott...Chevron has denied any part in any human rights abuses. Its executives argue that staying in troubled countries - even pariahs such as Burma - does more good than harm by employing locals and funding health and education programs. [also refers to Unocal]