New Delhi, March 20 -- Microplastics are hindering photosynthesis, the process by which plants convert energy from the sun into the fruit and vegetables we eat. This threatens massive losses in crop and seafood production over the coming decades that could mean food shortages for hundreds of millions of people.

So concludes an alarming new study. The authors combined more than 3,000 observations of the effects of microplastics on plants from 157 separate scientific reports, and then extrapolated the results using machine learning, a type of computer model that trains AI to spot patterns in data.

Microplastic exposure, they found, reduces photosynthesis in land plants and marine and freshwater algae by 7% to 12%. The authors calculated t...