Secondly, government procurement of sustainable goods and services would send strong signals to market players supplying government, which can help the market to get used to new specifications (OECD, 2012). The government’s public procurement database, to which all prospective government suppliers are required to register, could start to introduce green considerations. While challenging initially, trials in sustainable public procurement of vehicles, buildings, equipment and supplies could be launched, and there are international networks that can support this.