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A study showed that foul air slows down lung development. Researchers at the University of California, south of Los Angeles, published their findings in the New England Journal of Medicine. About 1,700 children from different communities in southern California participated in the study.

Scientists examine these children every year, starting at the age of ten and up to eight years. They say it's the longest study on air pollution and children's health to date.

Scientists have found that children who live in the dirtiest air environments are 5 times more likely to grow up to have weakened lungs. Many people breathe with less than eighty percent of their normal lung capacity.

But the researchers said they were more concerned about the long-term effects. They say that adults typically lose one percent of their lung capacity every year after the age of 20. Doctors point to weak lungs as the second leading cause of early death in adults. The first is smoking.

By the time people are eighteen years old, their lungs are fully developed, or almost complete. Doctors say it is impossible to recover from any damage.

The researchers say they are still unsure of the impact of air pollution on lung development. They are convinced that pollution affects oxygen in the air space with little impact.

I'm machine translating, but it's a little more accurate than what others call human translation.

Studies have shown that polluted air can reduce lung development. Researchers from the University of Southern California, based in Los Angeles, published their study in the New England Journal of Medicine.

About 1,700 children from different communities in southern California participated in the study. Scientists have spent eight years in a row testing every year, starting when a child is ten years old. They say it's the longest study on air pollution and children's health to date.

A study has shown that dirty air can reduce the development of lung cancer. Researchers from the University of Southern California in Los Angeles published it in the New England Journal of Medicine.

About 1,700 children from diverse communities participated in the study in Southern California. Scientists tested children every year for 8 years, starting at the age of ten. They say it's the longest study on air pollution and healthy kids.

Scientists have found that children who live in areas with dirty air may grow weaker lungs. Many people use less than eighty percent of their normal lung breathing intensity.

Other dirty air damage is just as bad as these children and parents smoke. Reduced lung strength in children from the common cold may suffer more serious effects, for example. But researchers have expressed concerns about greater long-term effects.

They say adults usually begin to lose one percent of their lung capacity each year after the age of 20. Doctors note that weak lung activity is the leading cause of early death in the second adult. The first is smoking.

Eighteen-year-olds, their lungs are fully developed, or close to it. Doctors said it was impossible to recover from any injuries.

Researchers say they still don't know how air pollution affects lung development. They consider the pollution to affect the space with little oxygen and air.