Offsetting means paying for an external project to reduce or sometimes absorb the emissions a country, organisation or person is emitting. But some argue in many cases they simply don’t work as intended, as, for example, it can be hard to ensure a forest stays standing or be sure a renewable power plant would not have been built even without the investment. Environmentalists are therefore concerned offsets can act as a “dangerous distraction” from what’s really needed – cutting emissions.