Chemical energy it is the energy stored in the chemical bonds of molecules
Carbon dioxide is emitted as a by-product of clinker production an intermediate product in cement manufacture, in which calcium carbonate (CaCO3) is calcinated and converted to lime (CaO), the primary component of cement. CO2 is also emitted during cement production by fossil fuel combustion.
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A tight junction is a watertight seal between two adjacent animal cells, which prevents materials from leaking out of cells.
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