Inaugurating the World Tourism Day celebrations in New Delhi, Vice President, M Venkaiah Naidu, urged all stake holders of the tourism industry to be mindful of their ecological foot print and called for more responsible and sustainable tourism practices. Observing that tourism is a major engine of economic growth and an important source of employment and foreign exchange earnings in many countries, Shri Naidu said that tourism in India has tremendous potential, considering the country’s rich cultural and historical heritage, varied ecology, terrains and places of natural beauty spread across the country.