The UN Environment Programme (UNEP) works to identify and draw attention to emerging issues of environmental concern. The UNEP Frontiers’ report continues to advance this work, signaling environmental issues and solutions for effective and timely responses. Some issues may be local, relatively small-scale issues today, but may have the potential to become an issue of regional or global concern if not addressed early. This year’s edition, Noise, Blazes and Mismatches, looks at three concerns: urban soundscapes, wildfires and phenological shifts.