Finns plan to drill deepest borehole in Europe

Thanks to a new drilling technology, the digging of the deepest borehole in Europe is set to begin in Finland. It is meant to be a forerunner of the world's longest undersea railway tunnel.

The recipe for CO2-free cement

The Finnish company Betolan has discovered a formula to replace cement, which is a major CO2 pollutant. However, the recipe remains the chef's secret.