Ballia (UP), May 01 (ANI): Speaking at the launch of 'Pradhan Mantri Ujjwala Yojana' in Ballia on Sunday, Prime Minister Narendra Modi said today nation's labourer number 1 extends his greetings to all the 'shramiks' (labourers) in the country for their tremendous hard work. He added that there was a time when the “labouers of the world unite and now the time is that labourers unite the world.” PM Modi saluted 'shramiks' hardwork, determination and dedication by saying that they have an invaluable role in the making of India. He added that they have started paying Rs. 1,000 pension to all the labour class of the society.