The European Federation for Landscape Architecture (EFLA) is expected to throw its weight behind an international campaign to promote urban greening at next month's Assises of European Landscape conference.
The body is planning to make an announcement at the event, held in Strasbourg, confirming its backing of Green Cities Europe. It follows collaborative talks with the campaign's UK forum, Green City UK, and the European Landscape Contractors Association.
EFLA president Nigel Thorne said: "We hope that our involvement will bring acknowledgement from more than 10,000 landscape architects that this campaign needs to be fought for and that we can contribute sustainable approaches in urban development to new construction programmes."
More green landscaping is urgently needed in cities to help to reduce the harmful effects of climate change and to improve well-being, he maintained.
The fifth annual European landscape event, which takes place on 10-12 October, will focus on "landscape as a creator of wealth".
Landscape architects and designers, together with planners, developers, landowners, green-space directors and Government representatives, will explore how urban landscape quality and design can contribute to cultural, ecological and economic prosperity.
Thorne explained that landscape design was too often viewed as a luxury in building projects. "If we don't begin to acknowledge what it can do for us - as well as what we should be doing for it - then we will be paying the price forever," he warned.
"We need to develop a basic understanding that landscape is not just a peripheral item in the construction world. It is the basis upon which our society generates its own lifestyles and living."
The proportion of harmful greenhouse gases emitted by cities occupying two per cent of the planet's surface - 70%