More than 2000 organizations and 150,000 citizen scientists have participated in the Australian Marine Debris Initiative (AMDI) by sorting and tallying up marine debris they have collected since it was set up by the not-for-profit Tangaroa Blue Foundation in 2004. Plastic is 84% of all rubbish found across Australian beaches，the study found that almost half of all debris could be related to land-based sources (litter and dumping on land) and 7% to dumping at sea, and at least half of plastic waste is polystyrene.

Households were the largest contributor, supplying 47% of all plastic waste，most of which are polystyrene. Common polystyrene domestic wastes include polystyrene disposable lunch boxes, polystyrene packaging boxes, etc. There is not much that residents can do for household waste. It is nothing more than sorting the waste to facilitate subsequent batch recycling. What should pay attention to polystyrene recycling should be the relevant government departments, taking into account the high power and prestige of government departments. If the government formulates some relevant recycling policies to incentivize large recycling yards for green recycling and public welfare publicity, then polystyrene recycling will be successful, and the plastic waste in the ocean will also decrease rapidly.

Relevant recycling policies

Relevant government departments should formulate some incentive policies to encourage large-scale recycling sites to use environmentally friendly polystyrene recycling methods. It is very important to advocate green polystyrene recycling methods because, in addition to direct dumping, a lot of marine garbage is caused by the incorrect recycling method of landfill. Due to the movement of the earth's crust, the white garbage that cannot be degraded enters the ocean.

The mechanical recycling method provided by GREENMAX is a good choice. Polystyrene compactor is an essential element. The principle of the whole mechanical recycling method is to first use a polystyrene compactor to compress polystyrene waste, then use these wastes to make plastic particles, and finally use these plastic particles to make other plastic products. The government should encourage the use of polystyrene compactors for polystyrene recycling in large-scale recycling sites and make some welfare policies such as some transportation subsidies and monetary incentives.

Public welfare publicity

Relevant government departments can send professionals to relevant large-scale recycling centers to promote environmentally friendly recycling methods. Popularize polystyrene compactors to relevant practitioners to make this environmentally friendly method popular. In addition, we can even go to primary and secondary schools to promote greener recycling methods. Let children know from an early age that the method of polystyrene recycling is not limited to the traditional, outdated way of incineration and landfilling.