Query: The cement, iron and steel, and petroleum refining industries could see their production cut by 21% 19%, and 11% respectively.”

Relevant passages:
Economy of Venezuela <=SEP=> The economy of Venezuela is largely based on the petroleum sector and manufacturing . Revenue from petroleum exports accounts for more than 50 % of the country 's GDP and roughly 95 % of total exports . Venezuela is the sixth largest member of OPEC by oil production . From the 1950s to the early 1980s the Venezuelan economy experienced a steady growth that attracted many immigrants , with the nation enjoying the highest standard of living in Latin America . During the collapse of oil prices in the 1980s the economy contracted , the monetary sign commenced a progressive devaluation , and inflation skyrocketed to reach peaks of 84 % in 1989 and 99 % in 1996 , three years prior to Hugo Chávez taking office .   Venezuela manufactures and exports heavy industry products such as steel , aluminium and cement , with production concentrated around Ciudad Guayana , near the Guri Dam , one of the largest in the world and the provider of about three-quarters of Venezuela 's electricity . Other notable manufacturing includes electronics and automobiles , as well as beverages , and foodstuffs . Agriculture in Venezuela accounts for approximately 3 % of GDP , 10 % of the labor force , and at least one-fourth of Venezuela 's land area . Venezuela exports rice , corn , fish , tropical fruit , coffee , pork , and beef . The country is not self-sufficient in most areas of agriculture .   In spite of strained relations between the two countries , the United States has been Venezuela 's most important trading partner . U.S. exports to Venezuela have included machinery , agricultural products , medical instruments , and cars . Venezuela is one of the top four suppliers of foreign oil to the United States . About 500 U.S. companies are represented in Venezuela . According to Central Bank of Venezuela , the government received from 1998 to 2008 around 325 billion USD through oil production and export in general , and according to the International Energy Agency , to August 2015 has production of 2.4 million barrels per day , 500,000 of which go to the United States of America .   Since Hugo Chávez 's `` socialist revolution '' half-dismantled its PDVSA oil giant corporation in 2002 by firing most of its 20,000-strong dissident professional human capital , and imposed stringent currency controls in 2003 in an attempt to prevent capital flight , there has been a steady decline in oil production and exports and a series of stern currency devaluations , disrupting the economy . Further yet , price controls , expropriation of numerous farmlands and various industries , among other disputable government policies including a near-total freeze on any access to foreign currency at reasonable `` official '' exchange rates , have resulted in severe shortages in Venezuela and steep price rises of all common goods , including food , water , household products , spare parts , tools and medical supplies ; forcing many manufacturers to either cut production or close down , with many ultimately abandoning the country , as has been the case with several technological firms and most automobile makers . In 2015 , Venezuela had over 100 % inflation -- the highest in the world and the highest in the country 's history at that time . The rate increased to nearly 500 % by the end of 2016 with Venezuela spiraling into hyperinflation while the population poverty rate was between 76 % to 80 % according to independent sources .

Technological and industrial history of China <=SEP=> The technological and industrial history of China is extremely varied , and extensive . China 's industrial sector has shown great progress using most of its technology from the 1950s .

Mineral industry of Africa <=SEP=> The mineral industry of Africa is the largest mineral industries in the world . Africa is the second largest continent , with 30 million km ² of land , which implies large quantities of resources . For many African countries , mineral exploration and production constitute significant parts of their economies and remain keys to economic growth . Africa is richly endowed with mineral reserves and ranks first or second in quantity of world reserves of bauxite , cobalt , industrial diamond , phosphate rock , platinum-group metals ( PGM ) , vermiculite , and zirconium . Gold mining is Africa 's main mining resource .   The Central African Mining and Exploration Company ( CAMEC ) , one of Africa 's primary mining enterprises , is criticized for its unregulated environmental impact and minimal social stewardship . In the spring of 2009 , retired British cricket player Phil Edmonds ' assets were seized by the United Kingdom 's government due to CAMEC 's illicit association with self-appointed Zimbabwean President Robert Mugabe .  CAMEC recently sold 95.4 % of its shares to the Eurasian Natural Resources Corporation . It is under restructuring and is no longer trading under the CAMEC brand .   African mineral reserves rank first or second for bauxite , cobalt , diamonds , phosphate rocks , platinum-group metals ( PGM ) , vermiculite and zirconium . Many other minerals are present in quantity . The 2012 share of world production from African soil was bauxite 7 % ; aluminium 5 % ; chromite 38 % ; cobalt 60 % ; copper 9 % ; gold 20 % ; iron ore 2 % ; steel 1 % ; lead ( Pb ) 2 % ; manganese 38 % ; zinc 1 % ; cement 4 % ; natural diamond 56 % ; graphite 2 % ; phosphate rock 21 % ; coal 4 % ; mineral fuels ( including coal ) & petroleum 12 % ; uranium 18 % .