refined bitumen is used in construction. not in itself an end-product, bitumen's primary use is as a constituent of products used in paving and roofing applications. approximately per cent of all the bitumen produced worldwide is used as the binder in asphalt for roads. it is also used in other paved...
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the mineral lepidolite. the scientists named both elements after the vibrant color of lines in their emission spectra, and thus "rubidium" derives from rubidus, the latin word for "dark red." the relative abundance of rubidium in the earth's crust is higher than originally assessed; now considered to...
the largest european energy utilities. the aim is to improve corporate responsibility in the coal supply chain, with a specific focus on the mines themselves. the bettercoal vision is a coal supply chain that protects the environment, respects the human rights of people and contributes positively to...