Explain why the tone of the passage below is worrisome and upsetting. Include at least one detail from the passage in your explanation. Evidence of the scale of plastic pollution has been growing in recent months. Earlier this year, scientists found plastic in 83 percent of global tap water samples. Other studies have found plastic in rock salt and fish.

Humans have produced an estimated 9 billion tons of plastic since the 1950s. Scientists said it risks near-permanent pollution of the planet.