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In page Southeast Asian haze:

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Countries have responded to haze events with state of emergency declarations, cloud seeding to clear air and mobilising firefighting resources to areas being burned. The public have also been recommended to stay at home with the doors closed, and wear face masks when outside to minimise exposure to hazardous air quality.[1][2][3] During the severe 1997 haze caused primarily by forest fires in Indonesia, Malaysian Prime Minister Mahathir Mohamad announced Operation Haze, sending Malaysian firefighters to Indonesia to support the response.[citation needed]