Amnesty International accuses Shell of false claims about its environmental impact in the Niger delta, saying that the oil company cannot be trusted and that there are "serious discrepancies" between the evidence of pollution and what Shell claims…According to official figures, there are several hundred oil spills a year in the delta, many of which involve Shell pipelines…"It is the communities that suffer…with their land and livelihoods destroyed by the pollution…” [says Amnesty Intl.]…The report argues that the investigations oil companies must conduct into spills are seriously flawed…The report…was shown to Shell before publication and includes the company's denials, refutations and explanations…A Shell spokesman in London said: "The Shell Petroleum Development Company of Nigeria (SPDC) firmly rejects unsubstantiated assertions that they have exaggerated the impact of crude oil theft and sabotage to distract attention from operational performance…”…