Research published to mark the beginning of World Green Building Week suggests that businesses in Europe could realise savings of up to $243 billion in reduced rental costs alone if their office buildings were refurbished to the most efficient standards. The analysis from Philips Lighting, claims the impact that could be made on rents across the world’s offices if business owners replicated the efficient usage of space achieved in a leading green building. The research suggests that in addition to reducing their carbon footprint, office tenants could see vast financial savings if their buildings were renovated in a way that uses space more effectively, particularly in buildings with a high number of empty spaces. The report calls for a doubling of the renovation rate of offices in developed countries to reach 3 percent per year, which it says will be a key factor in reducing emissions and offsetting increased global demand for energy from population growth and urbanisation.