Improving the air and water quality is one of the main challenges for port cities. In Barcelona (Spain), the port authority installed an innovative mupi (advertising panel), that purifies the air with the same capacity as 20 trees. In Rotterdam (The Netherlands), three new plastic catchers (Plasticvangers) have been installed to stop this kind of waste of lowing into the North Sea. The collected plastic will be reused for new sustainable products. This new initiative is a result from the collaboration between the municipality, water authorities, private companies, and the NGO Clear Rivers. In the same field, the port of Valencia (Spain) has received the EnerTIC award commitment to environmental sustainability and efficiency in port operations, especially for the GREEN C PORTS project, that includes an innovative network of sensors.