Better use of space, improving the insulation, getting more daylight into the buildings, reducing the energy consumption of the air conditioning and heating systems, making sure that the internal air quality is good, that we have increased natural ventilation opportunities in the mid seasons. You know these are some of the things we can do.

I think buildings should imitate ecological systems. Ecological systems in nature before we had human beings you know interfere with them exist in a state of stasis - they are self-supporting, self-sustaining.

In most ecological systems you have a composite, biotic components as well as abiotic components acting together to form a whole, whereas in a human built environment most of the components are abiotic or they are inorganic. One of the first things we need to do is to complement the inorganic components with more organic components, and to make them interact to form a whole.

We shouldn't just look at new buildings but at existing stock building because that's an even greater problem than the new buildings being built. The renovation of existing buildings and making them green is just as important as designing new green buildings.

Better use of space, improving the insulation, getting more daylight into the buildings, reducing the energy consumption of the air conditioning and heating systems, making sure that the internal air quality is good, that we have increased natural ventilation opportunities in the mid seasons. You know these are some of the things we can do.

I'm eternally optimistic about the future. I believe that if we are committed towards it and if we continue to educate people and get the whole world community to implement green features and aspects in not just the built environment not just in their lifestyles but in their businesses in their industries then we're heading towards a green future.

I think green buildings are extremely important but it's only part of the equation. A lot of people think that if I put a green building everything is going to be fine, but actually it's not just the green buildings we need, but green businesses, green governments, green economics. We have to extend the greening of buildings to our business and our lifestyles - that is the most important thing to do next.