An oil spill on the shores of the Niger Delta swamps. Shell has said the recent oil spill is likely to be worst in a decade. Photograph: Pius Utomi Ekpei/AFP/Getty Images An oil spill on the shores of the Niger Delta swamps. Shell has said the recent oil spill is likely to be worst in a decade. Photograph: Pius Utomi Ekpei/AFP/Getty Images
![Nigeria on alert as Shell announces worst oil spill in a decade](https://cdn-ak-scissors.b.st-hatena.com/image/square/017d3c59d239da9484dcbea60f4c776d8bfb9971/height=288;version=1;width=512/https%3A%2F%2Fi.guim.co.uk%2Fimg%2Fstatic%2Fsys-images%2FEnvironment%2FPix%2Fpictures%2F2011%2F12%2F9%2F1323434361580%2FOil-spill-007.jpg%3Fwidth%3D1200%26height%3D630%26quality%3D85%26auto%3Dformat%26fit%3Dcrop%26overlay-align%3Dbottom%252Cleft%26overlay-width%3D100p%26overlay-base64%3DL2ltZy9zdGF0aWMvb3ZlcmxheXMvdGctYWdlLTIwMTEucG5n%26enable%3Dupscale%26s%3D47898d9a4e70d175578be1aad04051fe)