What is the concept of Carbon Trading?

Carbon dioxide is produced mainly by burning fossil fuels such as coal and petroleum or through deforestation and it is the main greenhouse gas that is heating up the atmosphere leading seas to rise and greater extremes of weather. Putting a price on every tonne of carbon dioxide (CO2) produced by industry and transport or saved from being emitted by being more efficient or locking away carbon by growing trees provides a cash incentive to curb carbon pollution