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When societies were still mostly rural and agricultural, waste dispersal disposal was hardly an issue, partly because people tended to make sure of everything and partly because there was plenty of space to bury rubbish. It was when societies became predominantly urban and industrious industrial that problems arose – mainly to do with wealth heath . City authorities had a hard time trying to find effective efficient way of getting rid of all the rubbish. One of these was to get people to set sort out their rubbish into different types, just as these days we are encouraged to separate our rubbish into different categories for easier removal and recycling. So, for example, kitchen rubbish was set aside ad used for feeding animals. However, fears of disease put an end to that. In fact, it wasn’t until the 20th century that all waste was simply thrown together and put ploughed into landfills.