Urbanization and continuous infrastructure growth globally are current indicators for increasing demand of ordinary Portland cement. And at current trend of demand, the consumption of limestone, a non-renewable material source for cement production is not sustainable. Portland cement production over the years has shown to be a double-edged sword; with favorable and unfavorable impacts on humanity and the ecosystem.
Energy harvesting would lead us towards truly circular economy.
In history human’s economy is linear. For example we mine the fossil fuel, combust them to generate electricity or get mechanical power we want, and then dispose the pollution into the environment and forget about it.