Columbia subject headings:
Carbon offsetting--Economic aspects.
Carbon offsetting.
Emissions trading--Economic aspects.
Emissions trading.
Environmental impact charges.
Harvard subject headings:
Carbon offsetting--Economic aspects.
Carbon offsetting--Law and legislation.
Carbon offsetting.
Emissions trading--Economic aspects.
Emissions trading--Law and legislation.
Emissions trading.
Princeton subject headings:
Carbon offsetting--Economic aspects.
Carbon offsetting--Law and legislation.
Carbon offsetting.
Emissions trading--Economic aspects.
Emissions trading--Law and legislation.
Emissions trading.