School districts requiring facilities updates or replacements in at least half of schools

As of 2020, about 41 percent of school districts required HVAC system updates or replacements in at least half of schools, or about 36,000 schools nationwide.

"Environmental conditions" is exposure to asbestos, lead or mold.
Chart: Anna Deen Source: U.S. Government Accountability Office, K-12 Education report (2020)
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