Note that the estimate for the current annual demand is quite conservative since the catalyst replacement rate on oil- and gas-fired combustion units is likely to be less frequent than one-twelfth of the catalyst per year.
The amount of new catalyst required each year may be higher because the figures are very conservative.
mnli hypothesis: The amount of new catalyst required each year may be higher because the figures are very conservative. premise: Note that the estimate for the current annual demand is quite conservative since the catalyst replacement rate on oil- and gas-fired combustion units is likely to be less frequent than one-twelfth of the catalyst per year.