Kennedy says immediate conservation measures needed . Chevron 's Kennedy : Oil alternatives to take long time to develop . Robert Kennedy Jr. : Windfall profits taxes not an energy policy . O'Reilly : the National Resource Defense Counsel profits 19 percent .
Robert Kennedy Jr. says immediate conservation measures needed . Chevron 's David O'Reilly : Oil alternatives to take long time to develop . Kennedy : Windfall profits taxes not an energy policy . O'Reilly : Chevron profits about 7 percent .