[2026] PTE Academic Reading - Multiple Choice, Multiple Answers

Microplastics, defined as plastic particles smaller than five millimeters, have become a pervasive environmental pollutant found in every ecosystem on Earth.These particles originate from two primary sources: the fragmentation of larger plastic waste and the intentional manufacture of small beads for industrial and cosmetic use.Because of their durable chemical structure, microplastics do not readily biodegrade, allowing them to persist in the environment for centuries.In marine environments, these particles are frequently ingested by a wide range of organisms, from microscopic zooplankton to large whales.This ingestion poses a significant threat to biodiversity, as microplastics can cause physical blockages in digestive tracts and leach toxic additives into the animals' tissues.Furthermore, these pollutants can act as vectors for hazardous chemicals and pathogens, facilitating their transfer through the global food web.Recent studies have also identified microplastics in human blood, lung tissue, and placentas, raising urgent questions about their long-term impact on human health.While the full toxicological effects are still being studied, researchers are concerned that chronic exposure may trigger inflammatory responses or endocrine disruption.Addressing this crisis requires a multi-faceted approach, including improved wastewater filtration and a significant reduction in global plastic production.Without international regulatory frameworks, the concentration of microplastics in the environment is projected to double by the middle of the century.