Crystalline silica (silicon dioxide) is the most abundant mineral worldwide and is commonly encountered in areas of mining, construction, and farming.
The major source of donations were trusts affiliated with corporate conglomerates and companies in the mining, construction, infrastructure, power and telecommunications industries, the group said.
The Dow Jones Euro Stoxx 50 was down 68.60 points, or 1.6%, at 4,316.05 points, led down by the banking, mining, construction and financial services sector.
The noisiest industries included mining, construction, and manufacturing.
They are being used abroad to track changes at mining, construction and agricultural sites.
But those sectors tied to the government, including mining, construction and manufacturing, are struggling.
It also does big business there in machinery, cars, steel, railways, mining, construction and banking.
The most briberiddled sectors are oil, gas, mining, construction and transport.
Their companies reach into steel, autos, natural gas, power plants, mining, construction and media.
China is Africa's largest trade partner, with huge investments in mining, construction and banking, though it had been less active to date in Burkina Faso.
Other top sectors included steel, metals and mining, construction materials, homebuilding, and integrated oil and gas businesses.
