Waste products
As the living standards of people improve, they buy more things for their comfort. Televisions, computers, cars, air conditioners, and other household equipment, but the problem is what to do with this trash once they consume their life cycle. Some of them can be reused while others need to be dumped in the sea or deep in the ground. The plastic packaging of goods is also helpful as it does not let them rot away. On the other end, this plastic lasts for hundreds of years. In the same way, there are also many other materials that cannot be decomposed easily, rather require hundreds of years. All around big towns and cities, there are high rise garbage dumps that become the breeding grounds for infection-causing insects and filth.