Increased digitalisation is key to combatting climate change, with potentially 10-60% reductions of energy consumption and CO2 emissions. The challenge to harvesting these benefits is the state of digital technologies today, where hard physical limits of miniaturisation of electronic chips have been met. This in turn has brought with it a saturation of serial data speeds, and a looming explosion in overall internet energy consumption. It is thus increasingly urgent to develop a new greener internet. So, to ensure the essential future digitalisation, the solution is to build a better critical communications infrastructure that provides higher data capacities, offers greater accessibility, supports critical functions, ensures secure online interactions, and is more energy-efficient. To bring these features to the whole network infrastructure, GreenCOM is structured as an innovation platform forming an ecosystem of companies, universities, industrial associations and with direct links to authorities. GreenCOM will develop 30 specific technologies supporting the overall network, ranging from physical chips and laser sources, over network protocols, to internet services and a green ICT certificate. 91% of the technologies are tech transfer, with industrial partners ready to implement them. GreenCOM expects to reduce the energy consumption in DK with about 11%, and increase revenue for partners with 358 MDKK, and generate 183 FTE jobs whilst doing so.