Ann: Envirosuite Reports Q2 FY2021 Sales Update, page-19

These prices seem a little absurd given the space we are in and the fact that once aircraft ops get back to normal there is sure to be greater enviro demands by the public .
My train of thought is that for almost 12 months now there has been GREATLY reduced flying into and out of the worlds airports meaning people , businesses and wildlife near airports have gotten used to a much "quieter " life without the buzz of aircraft operating nearby . Once airports resume close to normal operating there will be a deluge of complaints about noise pollution etc and the ECO warriors will be out in force citing all manner of issues and demanding the governments take action which ( as governments are now so WOKE ) they will be falling over themselves to set a "NEW" standard and ensure compliance by airports/airlines .
I could be wrong but the way the world is now the above statement could very well ring true .