• Kyodo

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Authorities will urge residents to stay indoors if the level of toxic smog spreading to Japan from China is expected to exceed twice the maximum limit set by the central government, officials said.

The Environment Ministry guidelines say prefectural governments will recommend that people, especially those with heart or lung diseases, the elderly and children, refrain from going outside or ventilating their homes if the average amount per day of the air pollutant PM2.5 (particulate matter 2.5 microns in diameter) is projected to top 70 micrograms per cubic meter.

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