Oslo is a member of a number of international networks and organisations:
C40 Cities Climate Leadership Group is a network of the world’s megacities committed to addressing climate change. C40 supports cities to collaborate effectively, share knowledge and drive meaningful, measurable and sustainable action on climate change. Oslo is a so-called innovator city. Innovator Cities are smaller cities that have shown clear leadership in environmental and climate action. C40 is a political network of cities and Oslo is represented by Governing Mayor Johansen. As a C40 member Oslo annually reports its carbon emissions to CDP and is compliant with the Compact of Mayors.
The Carbon Neutral Cities Alliance (CNCA) is a collaboration of international cities committed to achieving aggressive long-term carbon reduction goals. Cities striving for carbon neutrality recognise that averting the worst impacts of climate change will require cutting GHG emissions by at least 80 % by 2050. The Alliance aims to address what it will take for leading international cities to achieve these deep emissions reductions and how they can work together to meet their respective goals more efficiently and effectively. The collaboration takes place at a strategic administrative level.
ICLEI - Local Governments for Sustainability is a worldwide environmental organisation for local authorities. ICLEI is recognised as the voice of local authorities and the UN Climate Negotiations. At the same time ICLEI Europe is working to promote exchange of best practice and expertise at an operational level. Oslo takes regularly part in ICLEI activities. Oslo is also a member of Procura+, a sub-network focusing on sustainable procurement and cooperates with ICLEI and fellow members in the Horizon2020 project BuyZET - Procurement of innovative solutions for zero emission urban delivery of goods and services
Eurocities is the main association of large cities in Europe. Eurocities works with its member cities to influence EU legislation and policy. Eurocities is also a platform where city-experts can share knowledge and ideas. Oslo is a full member of Eurocities and related to Green Oslo experts participate in Environment forum, Mobility forum and a number of Working groups on topics such as air quality, noise, waste, water management, green areas and biodiversity, Smart city logisitics & fleet management and developing a new mobility culture.
Oslo has signed several international initiatives relating to sustainable development. The most known are the Covenant of Mayors, Aalborg commitments, the Mexico Pact, Compact of Mayors, The Paris City Hall Declaration, as well as UN Global Compact and Earth Charter.