Plastic Pollution in Oceans May Be Lower Than Thought But Still a Major Concern

A recent study estimates about 500,000 tons of plastic enters oceans annually, half from land.
Overall plastic pollution in oceans still increasing 4% per year, doubling every 20 years.
Plastic harms marine wildlife through entanglement and ingestion.
Microplastics enter food chain, impacting human health.
More action needed to control plastic pollution at the source despite international efforts.