the $311 billion in appropriations, about $120 billion are set aside for crucial investment in Infrastructure and Science and Energy. Some of ARRA's aims include smart grid technology, retrofitting of homes and federal buildings, automated aviation traffic control, advancing freight and passenger rail services, and upgrading water and waste facilities. Other countries Worldwide, transformative public capital investments are taking place. China’s ambitious rapid high-speed rail program is estimated to extend 18,000 km by 2020. By the end of 2008, the country had a fleet of over 24,000 locomotives, the most lines in the world, the fastest express train in service, and longest high-speed track in the world. UK, Denmark, and other countries in northern Europe that surround the Baltic Sea and North Sea, continue to develop their rapid expansion of off-shore wind farms. With continued expansion of terminals and connection to nation's comprehensive transport system, the Hong Kong International Airport is one of the largest engineering and architectural projects in the world. In the last decade, Chile installed five combined cycle gas-turbined (CCGT) power plants to meet its nation's growing energy needs. See also Five Capitals Infrastructure Natural resource Sustainable development Sustainability References Capital (economics) Infrastructure investment Capital