Delta Works was completed by the Europoortkering which required the construction of the Maeslantkering in the Nieuwe Waterweg between Maassluis and Hoek van Holland and the Hartelkering in the Hartel Canal near Spijkenisse. The works were declared finished after almost forty years in 1997. In reality the works were finished on 24 August 2010 with the official opening of the last strengthened and raised retaining wall near the city of Harlingen, Netherlands. Due to climate change and relative sea-level rise, the dikes will eventually have to be made higher and wider. This is a long term uphill battle against the sea. The
History of agriculture in the People's Republic of China of advanced technology in rural areas. The scarcity of cultivable land and the abundance of manpower led to the development of labor-intensive production in most parts of the country. And, although China's agriculture was less labor-intensive than that in some neighboring countries, it was characterized by meticulous tending of the land and other techniques employed in East Asia for centuries. In the 1980s the rural labor force also was employed in rural capital construction projects and small-scale industries. During the winter months, large numbers of rural people worked on construction and maintenance of irrigation or land-leveling projects. Where rural industrial