World Ocean Day 2019: Ocean plastics problem isn't going away, but here's what you can do to help

The consequences from the mass production, consumption and discarding of plastics continue to get worse and worse, and the health of the environment -- especially the world's oceans -- is deteriorating because of it.

The problem with plastics is relatively new but serious, John Hocevar, marine biologist and oceans campaign director for Greenpeace USA, told ABC News. The mass production of plastic emerged in the 1950s and has continued to expand exponentially ever since, and almost all of the plastic that has ever been made "is still with us here today," Hocevar said. The materials never completely disintegrate, but rather break down into microplastics, particles less than 5 millimeters in diameter, that continue to be distributed throughout the earth.

More than 8.3 million metric tons of plastic has been produced globally in the last 70 years, Dianna Cohen, CEO of the Plastic Pollution Coalition, told ABC News.

Every year, 8 million metric tons of plastic enters the ocean, according to a 2016 study published by the World Economic Forum. This equates to a garbage truck full of plastic being dumped into the ocean every minute, and if the trend is not upended, that number could increase to four dump trucks of plastic entering the ocean every minute, the study predicted.

Most plastic is not dumped intentionally into the ocean, Hocevar said. Because plastic is light and there is so much of it, it ends up being washed down drains by rainwater or blown by wind into bodies of water that flow into rivers and ultimately the ocean, Hocevar said. Much of the plastic in landfills doesn't stay there because it's lightweight and gets scooped up by the elements, he added.

"Unfortunately, the message to the rest of the world is Asia is the one that's causing the problem," she said.

There are currently 5 trillion pieces of plastic waste in the world's oceans, according to The Ocean Cleanup, a project dedicated to ridding the ocean of waste.

The reason why it is so difficult to clean the existing plastic from the ocean is because of the sheer amount of trash that currently exists, Hocevar said. There is no approach yet designed that can filter plastic out of that volume of water, especially microplastics, Hocevar said.

More than 800 species of marine animals are affected by plastics, and the entire marine ecosystem is now contaminated, Nick Mallos, the director of the Ocean Conservancy's Trash Free Seas program, told ABC News.

Plastic has been a "huge" problem for sea turtles and whales, which are washing up dead with stomachs and throats clogged with plastic, Hocevar said.

Most baby sea turtles are ingesting plastic, and most seabirds are eating plastic and feeding plastic to their chicks, Hocevar said. Fish of all sizes are also eating plastic, which accumulates up the food chain to humans, he added.

The animals often die "slow, painful deaths," often of starvation, because their stomachs are full of plastic that never digests.

The best solution to keeping plastic from ending up in the ocean is to not make so much of it, Hocevar said, adding that the "game changer" will be when politicians and corporate executives work together with environmental advocates to enact policies for a healthier planet.

"The good news is that everyone understands that we have a problem and that we can't keep on going the way we have been," Hocevar said. "It makes sense to people that we can't keep making things we use once and throw away out of materials that basically last forever."

This will involve governments enacting legislation on plastics, similar to the ban states like California, Hawaii and New York have placed on plastic bags, Mallos said.

"So, we may not be able to remove all the plastic that we've already put into the environment, but we can keep this from getting much worse," Hocevar said.

Rethinking the way you use, reuse and discard plastic will make a seismic difference in the amount of plastic that ends up in the oceans, according to the experts.

This will involve people saying no to plastic bags and plastic straws, as well as increasingly utilizing reusable and refillable items instead of single-use throwaway packaging, Hocevar said.

"The ultimate way is to reduce our use of single-use plastic," Monteleone said.

"What we really need to do is to prevent more trash from entering our oceans," said Nancy Wallace, director of the National Oceanic and Atmospheric Administration's Marine Debris Program. "That’s something we all can really make a difference on."

And if participating in an organized beach cleanup isn't possible, Mallos recommended even just taking a bag while walking the dog and picking up whatever you find.

"Every piece maters, and every piece makes a difference," he said.

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