Ann: Bowdens Silver Project Update, page-73

Connecting to the grid is usually the cheapest and most stable option hence why it was their likely first option. Diesel generators have the issue of higher fuel and maintenance costs and there are environmental issues for local fuel spills and I'm sure wider climate issues are looked at in any EIS today. Natural gas could be a better option than diesel. Solar would have a higher set-up cost but over the long term could be effective, but of course, needs batteries for backup and probably generators for backup after that for long periods of low sun - no idea how the region of the mine fares for this option. I could go on, but the point is lots of modelling is needed as no clear solution for what is best and these I'm sure are the things the company is weighing up for the pros and cons of each approach. The lowest environmental impact would probably be the key consideration as takes off the table the local NIMBYs rallying around it for a fight even though I'm sure they'll find something to complain about.