Other countries in Southeast Asia, including Thailand and Malaysia, have started buying up some of the recycling exports that had previously gone to China.
Recycling facilities across Southeast Asia have tried to take in some of the world's recycling exports, but they could not match China's volume, according to National Geographic.
With China's ban now in place, some cities in Malaysia are overrun with the world's plastic waste.
Recognizing that there was money to be made from Malaysia's burgeoning plastic industry, locals in Jenjarom established illegal recycling factories throughout town.
Many plastic recycling plants in Malaysia are unmarked and rented from local landlords.
Instead of handing over un-recyclable scraps and parts to waste centers, the illegal factories cut costs by burning those scraps, releasing noxious fumes.
Burning plastic can release toxic chemicals like mercury, dioxins, and polychlorinated biphenyls (PCBs) into the atmosphere, which poses a threat to human health.
A 2016 study found that burning plastic waste could increase the risk of heart disease and cause damage to the nervous system. The study also noted side effects like rashes, headaches, nausea, and worsened asthma.
The link between burning plastic waste and cancer is more tenuous, since it depends on how long a person is exposed. Over a long period of time, plastic fumes could become carcinogenic.
Local residents have said they started to become ill around the same time that the garbage piles arrived.
Residents in Jenjarom told the BBC they experienced rashes and violent coughing attacks.
A single site near a palm oil plantation in Jenjarom contains 4,400 tons of waste.
Malaysia's environment minister told the BBC that no one was interested in purchasing the contaminated site when the state government tried to auction it off.
She added that transporting the garbage to a cement plant could cost nearly 2.5 million Malaysian ringgits ($615,000 USD).
In July, the nation's housing authority investigated 114 permitted factories and found that only eight met their requirements.