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With the Environment Pollution (Prevention and Control) Authority (EPCA) on Friday declaring an air emergency in the Delhi-NCR amid deteriorating pollution levels, the state government has ordered all schools to remain shut till November 5. The EPCA asked the governments of Delhi, Haryana, Uttar Pradesh, and Rajasthan to issue advisories asking the public to minimise exposure to surroundings and other measures taken to try to curb the challenging levels of pollution.