A...sign above the well...says 'caution: not fit for use'... "…Don't get any in your mouth or you'll be sick," said Victoria Jiji…as she walked past the bore hole in...Ekpangbala...A landmark U.N. report on August 4 last year slammed multinational oil companies, particularly…Royal Dutch Shell, and the government, for 50 years of oil pollution that has devastated this region of the Niger Delta...It said the area needed the world's biggest ever oil clean-up...Shell and the government swiftly pledged to act on it...One year on, residents say they've seen no evidence that it has begun...UNEP cautiously welcomed the government's pledge [last week of new action]...but warned that the clean-up was a huge task...and urged funds to be released now...Shell accepted responsibility for two major oil spills that devastated the Bodo fishing community in 2008/9, but it says efforts to clean up had been hampered by insecurity..."The real tragedy of the Niger Delta is the widespread illegal activity," [said] Mutiu Sunmonu, managing director of the Shell Petroleum Development Corporation [joint venture Shell, Nigerian National Petroleum Company, ENI, Total]... [also refers to BP]