India's infrastructure plays an important role in its economic development but lacks world-class infrastructure, which pulls down GDP growth by 1-2% annually. Infrastructure includes electricity, railways, roads, ports, airports, irrigation, and sanitation. India needs to invest over $1 trillion in infrastructure by 2019 to support sectors like energy, transport, communication, education, and health. Improving infrastructure can increase national income, employment, urbanization, attract foreign investment, and support rural development. However, India faces challenges like difficulties acquiring land, funding constraints, poor planning and execution, and population growth.