The levels of pollutants in Antarctica are, in general, lower than elsewhere in the world. This applies to those in the air, water, sediments, animals and plants, and is primarily because there is less industry and farming in the Southern Hemisphere. Because the pollutant problem has so far not been regarded as significant in Antarctica, there is no overall monitoring programme for pollutants here. There are currently few investigations of levels of pollutants in the Antarctic marine food chain. The Antarctic Peninsula and Ross Bay are the two most investigated areas.