Recycling can have big environmental benefits. For one thing, it keeps unwanted objects out of landfills or incinerators, where they can produce potent greenhouse gasses and potentially hazardous pollutants.

Even more important, recycling allows us to extract fewer resources. The amount of energy required to recycle aluminum, for example, is less than 5 percent of the energy needed to mine new ore from the ground. Similarly, the more paper we recycle, the fewer trees we cut down.

But recycling rates in the United States have remained stubbornly flat for years. And, in some cases, they’re dismal. Just 10 percent of plastics are actually recycled. Meanwhile, hundreds of thousands of tons of recyclable waste are exported, often to developing countries.

It’s no wonder a lot of readers have asked us whether individual efforts make any difference at all. To answer that question, it helps to understand how the system works and how people use it.

Why is recycling struggling?

The way the system is set up, recycling is a business. And our recyclables — metals, paper, and plastics — are commodities.

When you throw something into the blue bin, whether it’s recyclable or not, it gets carted off to a sorting plant where it runs along a conveyor belt and gets grouped with similar items. Then, the recyclable stuff is bundled. The process is labor-intensive.

One of the biggest challenges is that companies don’t want their material contaminated with things they don’t recycle or can’t recycle. The more random stuff that goes into a sorting plant, the more work facilities need to do to weed it out. And that increases costs.

Once that’s done, if the plant can find a buyer at a price that makes sense, the bundles will be shipped off to a recycling plant. Sometimes a local one, and sometimes one as far away as Africa or Southeast Asia. If they can’t, everything goes into a landfill or gets incinerated.

Some items are easy. Others, not so much.

Recycling metals makes a lot of sense from an economic perspective, for the reasons outlined above. It’s just a lot cheaper than scraping ore from the ground. And, metals like aluminum can be endlessly recycled.

It also makes environmental sense. Mining contaminates soil and waterways. Recycling aluminum cans requires just a small fraction of the energy and water that mining does.

And recycling paper helps keep forests intact. Paper packaging accounts for around 10 percent of global logging, according to the forest conservation group Canopy. We save water, energy and greenhouse gas emissions when we recycle compared with products made from new pulp.

Source link: https://www.nytimes.com/2024/06/17/climate/ask-nyt-climate-recycling.html