As we reported in Wireless Watch last week, there is rising concern that 5G networks, far from reducing energy consumption and emissions, will be more power-hungry than their predecessors. Nokia and Finnish operator Elisa have announced their contribution to addressing this challenge, a liquid-cooled base station that claims to reduce carbon dioxide (CO2) emissions by up to 80%. The companies worked with energy company Efore to install the equipment in an apartment building in Finnish capital Helsinki. Heat emitted from the base station is redirected to heat the building, lowering energy costs. Nokia Bell Labs, which developed and tested the solution, said it saw a reduction of up 80% in CO2 emissions and up to 30% in energy operating expenses,…