When I first arrived at New College a few years ago, one of the friendly faces welcoming me to the city was Cathy Cook, a Masters student who has since returned to Australia. Cathy explains what led her to join in and help organise this event. You can read some endorsements here, but do we really need permission to pray?
Of course, prayer is the heart and start of Christian action, without being isolated from other actions that express our faith, love and hope in the God who hears our cries. Yet it is in prayer that we are grounded afresh in the grace of God and call upon the Father's goodness. It therefore seems appropriate that this action, which consists first and foremost of patient waiting, an expectant silence and yearning groans, might become a unifying experience of trust in a listening Father.
The goal is simply to commit oneself - and if possible, one's church family - to pray for issues related to climate change on 6th November. You can find an invitation with more information on how to join in and get your church or local group involved. The website also has many resources available for download (and more here) to help plan for the day. Participation can be as detailed or simple as is appropriate for your context.
And of course, you don't need to wait until 6th November to start praying.