Carbon Neutral is a term used to describe the state of an entity, where the carbon emissions caused by them have been balanced out by funding an equivalent amount of carbon savings elsewhere in the world.
A carbon ‘footprint’ is a way of describing what amount of greenhouse gases were added to the atmosphere as a result of some activity, as measured in the equivalent amount of carbon dioxide (CO2e). For example, the carbon footprint of a hairbrush using recycled material will be less than another brush using virgin plastic material.