It's a very big and multifaceted issue. Some govts. have started tackling it, but many continue to ignore the problem. We have created some great non-petroleum based plastics that breakdown safely into organic compounds in the US, but our market is small so they have been developed and marketed in Europe.
I'm following a series about plastic. So far it has listed some interesting data:
How plastic is used
Depending upon the region,
packaging consumes 35 to 45 percent of the synthetic polymer produced in total, where the polyolefins dominate. Polyethylene terephthalate, a polyester, dominates the market for beverage bottles and textile fibers.
Building and construction consumes 20 percent more of the total polymers produced, where PVC pipe and its chemical cousins dominate. PVC pipes are lightweight, can be glued rather than soldered or welded, and greatly resist the damaging effects of chlorine in water. Unfortunately, the chlorine atoms that confer PVC this advantage make it very difficult to recycle — most is discarded at the end of life.
Polyurethanes, an entire family of related polymers, are widely used in foam insulation for homes and appliances, as well as in architectural coatings.
The automotive sector uses increasing amounts of thermoplastics, primarily to reduce weight and hence achieve greater fuel efficiency standards. (broken link removed to https://www.cbi.eu/sites/default/files/market_information/researches/product-factsheet-europe-plastics-vehicles.pdf) that 16 percent of the weight of an average automobile is plastic components, most notably for interior parts and components.
Over 70 million tons of thermoplastics per year are used in textiles, mostly clothing and carpeting. More than 90 percent of synthetic fibers, largely polyethylene terephthalate, are produced in Asia. The growth in synthetic fiber use in clothing has come at the expense of natural fibers such as cotton and wool, which require significant amounts of farmland to be produced. The synthetic fiber industry has seen dramatic growth for clothing and carpeting, thanks to interest in special properties such as stretch, moisture-wicking and breathability.
As in the case of packaging, textiles are not commonly recycled. The average U.S. citizen
generates over 90 pounds of textile waste each year. According to Greenpeace,
the average person in 2016 (PDF) bought 60 percent more items of clothing every year than the average person did 15 years earlier, and keeps the clothes for a shorter period of time.
https://www.greenbiz.com/article/world-plastics-numbers