They may be highly expensive and lack many of the multiple benefits associated with Blue-Green infrastructure.

The multiple benefits of adopting Blue-Green infrastructure will span both the local/regional and global/international scales.

Green Infrastructure or blue-green infrastructure is a network providing the "ingredients" for solving urban and climatic challenges by building with nature.

Key barriers to effective implementation of Blue-Green infrastructure can arise if planning processes and wider urban system design and urban renewal programmes are not fully integrated.

It is part of the blue-green infrastructure of Greater Montreal as well as the Mont Saint-Bruno Forest Corridor.

The design concept provides for a multifunctional, rich urban environment, which includes not only technical solutions for energy efficient buildings, but encompasses the implementation of blue-green infrastructure and ecosystem services in an urban area.

Also known as "blue-green infrastructure" or "green-blue urban grids" the terms are used by many design-, conservation- and planning related disciplines and commonly feature stormwater management, climate adaptation and multifunctional green space.

The key functions of Blue-Green infrastructure components include water use/reuse, water treatment, detention and infiltration, conveyance, evapotranspiration, local amenity provision, and generation of a range of viable habitats for local ecosystems.

However, it is apparent that the term "blue-green infrastructure" is applied in an urban context and places a greater emphasis on the management of stormwater as an integral part of creating a sustainable, multifunctional urban environment.