An expert committee has opined that India's economic growth momentum cannot be sustained if urbanisation is not actively facilitated. The report has advocated that the challenge of urbanisation will have to be addressed through a combination of increased investment, strengthening the framework for governance and financing and a comprehensive capacity building programme at all levels of governance. The high-powered expert committee on urban infrastructure chaired by Isher Judge Ahluwalia on Monday submitted its report to Urban Development Minister Kamal Nath and Housing and Poverty Alleviation Minister Kumari Selja in New Delhi. After receiving the report, Mr. Nath said, there is a requirement for capacity building and institutional building to sustain growth in urban sector. AIR correspondent reports, urban population is expected to increase from about 350 million in 2010 to 600 million in 2031. It is estimated that urban infrastructure will require a total investment of 39.2 lakh crore rupees over the next 20 years with 17.3 lakh crore rupees for urban roads, 8 lakh crore rupees for sectors delivering urban services such as water supply, sewerage, solid waste management and storm water drains, 4 lakh crore rupees for renewal and redevelopment including slums.