profit is calculated by subtracting costs from In many tries to define the definition of 'time'; we sometimes make use of the very word as part of the definition. Although time is definitely an ever-present concern of humans; this only clearly demonstrates the issue in formulating an obvious precise and easily understood definition this agreement we are going to all universally agree and accept. The UK glass industry is pursuing an active programme on energy efficiency and decarbonisation. But building the business case to secure funds remains a barrier. Capital costs can be very high and paybacks periods are often in excess of two years; traditional loans are usually unattractive for this work.