All efforts are being made to eliminate child labour from Alangayam, Anaicut, Arakkonam, Kaveripakkam, Wallajah and Nemili unions in the district, according to Collector S Gopalakrishnan. Speaking to journalists here, on Tuesday, he said the district had 1,631 hazardous industries, including beedi [cigarettes], match box, tanneries, powerlooms, mechanic shops, etc.