Chandigarh is a city and a union territory in the northern part of India that serves as the capital of the states of Punjab and Haryana. As a union territory, the city is ruled directly by the Union Government and is not part of either state. Chandigarh and adjoining cities of Mohali(Punjab) and Panchkula(Haryana) are together called Chandigarh Tricity. The city of Chandigarh was the first planned city in India post-independence in 1947 and is known internationally for its architecture and urban design. The master plan of the city was prepared by Swiss-French architect Le Corbusier, transformed from earlier plans created by the Polish architect Maciej Nowicki and the American planner Albert Mayer. Most of the government buildings and housing in the city, however, were designed by the Chandigarh Capital Project Team headed by Pierre Jeanneret, Jane Drew and Maxwell Fry. The city experiences extreme climate and uneven distribution of rainfall. The roads in Chandigarh are surrounded by trees and it has the third highest forest cover in India at 8.51% following Lakshadweep and Goa. The city tops the list of Indian States and Union Territories by per capita income in the country. The city was reported to be the cleanest in India in 2010, based on a national government study, and the territory also headed the list of Indian states and territories according to Human Development Index. The metropolitan of Chandigarh-Mohali-Panchkula collectively forms a Tri-city, with a combined population of over 2 million. This is the first smoke-free city in India.