Steve LeachA #climatechange idea that's been on my mind for a number of years now: Air liquification ( https://en.wikipedia.org/wiki/Cryogenic_energy_storage ) is a viable way of storing energy on its own and particularly attractive at large scale. These systems usually filter out CO2, but dry ice could easily be produced as a by-service of the battery, meaning that a municipal energy storage system could do double duty for #carbondrawdown and #carbonsequestration - pump into ground, use in sequestering industrial processes, etc.
#carbondrawdown is going to be essential - yes, we need to stop further emissions, but we also need to deal with centuries of emissions. Large scale deployment of #cryogenicenergystorage generating dry ice serve as a primary means of carbon collection. What already is a good long lasting option for large scale #renewable #energy storage could serve as carbon scrubbers almost for free, just by adding a mechanism to extract dry ice instead of filtering out CO2. https://en.wikipedia.org/wiki/Cryogenic_energy_storage