I have a feeling you mean carbon sinks instead of carbon skinks.
Carbon sinks are a key factor for our environment. They act like sponges that soak up carbon compounds that are playing a huge role in earths climate change. Carbon sinks are basically holding tanks for carbon or carbon compounds like carbon dioxide.
To break it down a little more a carbon sink is an artifical or natural reservoir that collects and stores carbon-containing chemical compounds for a indefinite period of time. The process where carbon dioxide is removed from the atmosphere is also known carbon sequestration
Hope this helps :)
