Air cargo the area surrounding the city and thus land access. As this access was closed, in the so-called Berlin blockade, an airlift remained the only option to get increasingly urgent deliveries of food, coal, and other supplies to West Berlin. Over 330 days to 12 May 1949 a total of 2.26 million tons of cargo were airlifted to Berlin, an average of 6,800 tons a day, 80% by the US and 20% by the UK. Although freight traffic developed modestly, reaching only 800,000 tonnes worldwide by the mid-1950s, the world economy was hitting its post-war stride. Germany and Japan were emerging
Technological and industrial history of China Approximately 25 percent of the country's coal went for steel production in 1985. In 1985 capital construction, considered excessive by the Chinese, exacerbated existing shortages of rolled steel, and imports filled 25 percent of domestic demand. The Ministry of Metallurgical Industry (now defunct) reported in 1985 that China had 13 plants capable of producing at least 1 million tons per year. Accounting for approximately 65 percent of total production, these mills were built mostly during the 1950s. The Anshan plant was the oldest and most productive of all, producing 7 million tons per year. The next largest was in Wuhan.