The Climate 101 briefing is a primer that contextualises the latest research on climate change, with the goal of providing essential knowledge to support discussion and meaningful action. It shows that we are locked into further future warming, even with a transition to net-zero. However, we are still very much in control of how much future warming we will experience. We can decide to see the net-zero transition as an opportunity, or forfeit to the harsh realities of climate change.