China's State Council, or cabinet, said in February that the country needed to raise the efficiency of logistics and transport, and highlighted the need to streamline such operations while encouraging the use of more environment-friendly vehicles as well as "green" warehouses and business parks.

WSJ: Investors Target Logistics Property in China

To date, 64 European airports have signed up to the Airport Carbon Accreditation Scheme, a voluntary initiative launched in 2009 that aims to reduce emissions from ground transport, boost the use of renewable energy and increase the energy efficiency of airport terminals.

BBC: Airports doing more to go green

The centre, which opened in 1975, contains a range of interactive displays on wind, water and solar power, green transport and energy efficiency.

BBC: NEWS | UK | Wales | Mid | Praise for town's 'green' residents

Participants also recognized the process of building green economies and societies as a source of job creation in sectors such as renewable energy, energy efficiency in buildings and construction, sustainable transport, and organic farming.

UNESCO: Education