Gas flaring happens when oil is pumped out of the ground, producing gas. The gas is separated out and, in Nigeria, is usually burnt as waste. This practice, combined with numerous oil spills, has left communities in the Niger Delta with little option but to drink polluted water, eat contaminated fish, farm on spoiled land and breathe in air that smells of oil and gas. It also makes a mockery of Shells much-flaunted business principles."Shell oil" oil environment "oil spill" "Niger Delta" Nigeria "human rights" water "amnesty international"