<prompt> Translate the following text to EnglishKwa sababu ya uchafuzi wa mazingira katika pwani ya Estoril, unapaswa kuogelea karibu na Lisbon kuliko katika Estoril yenyewe, ambayo imepokea bendera ya bluu ya EU kwa hali ya usalama.  <response>: Because of pollution along the Estoril Coast, you should not swim any closer to Lisbon than at Estoril itself, which has been granted an EU blue flag for safe conditions. 