A practical example of carbon cancelling is the emissions caused by one's automobile. Individuals emit CO2 through the use of their car for their necessary daily chores. Company cars emit CO2 whilst carrying out regular business activities which are required for the survival of the corporation and its employees. This all contributes to the global warming problem.
However by participating in green activities in developing countries one can offset these effects by supporting e.g. biomass, windpower, solarpower or hydropower projects. These projects are a step in the right direction, they will slowly be replacing the fossil fuels.