The presence of companies like Shell in the Niger-Delta has led to extreme environmental issues in the Niger Delta. Many pipelines in the Niger-Delta owned by Shell are old and corroded. Shell has acknowledged its responsibility for keeping the pipelines new but has also denied responsibility for environmental causes. This has led to mass protests from the Niger-Delta inhabitants and Amnesty International against Shell and Friends of the Earth Netherlands. It has also led to action plans to boycott Shell by environmental groups, and human rights groups. In January 2013, a Dutch court rejected four out of five allegations brought against the firm over oil pollution in the Niger Delta but found a subsidiary guilty of one case of pollution, ordering compensation to be paid to a Nigerian farmer.
Many pipelines owned by Shell in the Niger Delta are described as what? (If the question is unanswerable, say "unanswerable")
old and corroded