Humans produce ____ waste when they go to the ____. This can contain gut ____ so it is important that this is ____ before being released into the environment. Sewage is ____, sedimented and separated into liquid ____ which is digested ____ by bacteria before it is safe to release. The remaining solid ____ is digested ____ to produce methane ____ and ____. Humans also produce household waste that ends up in ____ sites that takes up space and ruins ____. Factories produce ____ waste which contains ____ chemicals that can affect how plants grow and therefore effect the entire ____ that depends on those plants. Nuclear power stations bury ____ waste underground and sometimes those power stations can have accidents like ____ that leaves the soil ____ for centuries afterwards. Farmers use strong chemicals called ____ to kill the insects that feed off their crop. Sometimes these pesticides kill beneficial natural ____ of the pests of beneficial ____ of other crops. The pesticides that have been eaten by an insect then get taken in by the secondary ____ that feeds off that insect. However the secondary consumer will eat ____ insects so the pesticide will ____ up inside their bodies. Then a ____ consumer feeds on them and several other creatures filled with pesticides. Therefore the pesticides ____ as you go along the food ____. This often has a devastating effect on the ____ predator.

land pollution

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