I would say that the wood is CO2 in sticks. A piece of wood is carbon extracted from the atmosphere. When we have sustainable uses for wood, to replace products like steel or concrete, or even plastic products made from oil that emit a lot of greenhouse gases, wood absorbs carbon and keeps it there as long as it's in use.
For example, if you set up a wooden structure or install a beam in an arena, as long as the arena stands, the CO2 will be trapped. Wood can store CO2 that was in the atmosphere and was disturbing the climate.
The more we put wood and sustainable forest products in the service of humans, the more we will limit the harmful effects of rising CO2 levels that come from burning fossil fuels.