Indonesia has shipped tons of Australian garbage out of the country, an official said Tuesday, as Southeast Asian nations push back against serving as dumping grounds for foreign trash.

Eight containers of trash - weighing some 210 tons - left Indonesia's second-biggest city Surabaya on Monday aboard a cargo ship bound for Singapore, the local customs agency said.

The move comes less than a week after Australia pledged to stop exporting recyclable waste amid global concerns about plastic polluting the oceans and increasing pushback from Asian nations against accepting trash. Last month, Indonesia said it would return the Australian rubbish after authorities found hazardous material and household trash, including used diapers and electronic waste, in containers.

Around 300 million tons of plastic are produced every year, according to the Worldwide Fund for Nature.