People love to connect with nature and that's possible with vertical gardens on high-rise developments. But gardens need a gardener to keep things under control.
Changes to the way houses and other buildings are constructed could lower energy use and greenhouse gas emissions.
A building designed to be easily taken apart so the components can be reused is a model for much less wasteful construction. It reduces resource use and environmental impacts, and can be cheaper too.
Australia is in the midst of a solar energy boom, yet it is lagging behind other countries when it comes to 'building-integrated photovoltaics' - solar cells built into the very fabric of buildings.
South Africa needs to develop low-cost housing solutions that are inherently comfortable and environmentally sustainable. Green roofs could be part of these solutions.
Buildings are responsible for 40 per cent of energy-related carbon dioxide emissions worldwide. Efforts to reduce emissions should no longer be voluntary.