Carbon sinks are organic matter, or matter that has come from a recently living organism, limestone, shells, or even burial of organic material. One example is a redwood tree. They are carbon sinks because are they are long lived trees. Another example are plastic water bottles. One last example is a buried dog bone because the bone is organic matter, it's just buried in this situation. Carbon sinks can be dangerous because water bottles are bad for the environment unless they are disposed of properly because they take over 100 years to break down, and six pack soda holders can choke small marine animals. Carbon sources include respiration of living organisms such as people jumping rope, jogging, and running. Release agents are basically factories. One of them is a Lego factory. Others include human activities and forest fires. Human activities are cutting rainforests, which is bad, and forest fires are bad too.
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