UN Environment’s 2018 Emissions Gap Report takes a close look at the pledges that countries have made to reduce their emissions.

It calculates how far those pledges will go to prevent dangerous levels of warming, and it shows just how much more action is needed to keep us on a safe path. So what will happen to greenhouse gas emissions in the future? It all depends on how much countries choose to do to reduce their emissions. Scientists have modeled a number of scenarios, taking into account the climate pledges — known as “nationally determined contributions,” or NDCs — that countries committed to in the Paris Agreement on Climate Change.