NEW YORK: Industry-generated greenhouse gas emissions could be reduced by more than half with a new method to produce cement, says a study.

Reducing the ratio of calcium to silicate in cement production would not only cut those emissions, but would actually produce better, stronger concrete, the findings showed.

Cement is made by cooking calcium-rich material, usually limestone, with silica-rich material – typically clay – at temperatures of 1,500 degrees Celsius, yielding a ha ..