WASHINGTON — The Senate voted to block the Environmental Protection Agency from using studies that expose people to pesticides when considering permits for new pest killers. By a 60-37 vote, the Senate approved a provision from Sen. Barbara Boxer, D-Calif., that would block the EPA from relying on such testing -- including 24 human pesticide experiments currently under review -- as it approves or denies pesticide applications. The Bush administration lifted a moratorium imposed in 1998 by the Clinton administration on using human testing for pesticide approvals. Under the change, political appointees are refereeing on a case-by-case basis any ethical...