Ludhiana, Punjab (March 26, 2014): Thousands of Sikhs all across the world took concrete green actions by celebrating the Sikh Environment Day on March 14. Over 2000 Sikh Gurdwaras, Schools and organisations marked this day when Guru Har Rai, known for his deep love and sensitivity towardsnature and its preservation, became the seventh Sikh Guru in 1644.