Leakage effects are defined as the geographical displacement of activities from one place to another region. They occur as a result of land use policies and conservation efforts aimed at reducing environmental pressure in one place shifting the pressure on ecosystems elsewhere. As a consequence, leakage effects counteract with the intended effect of the policy and take place at all geographical scales. The presence of leakage effects involves numerous environmental damages such as biodiversity loss, destruction of carbon sinks, soil degradation, and the disruption of hydrological and carbon cycles which are often the result of land-use change. The possibility that the concept of conservation efforts are undermined due to the partial coverage of policies should be considered when generating and evaluating policies. There is a need for a broad and international accounting scheme to evaluate the influence leakage effects have on sustainability and efficiency on a global scale. Several studies examined the evaluation of the impact of leakage effects, including different assessment methods such as equilibrium modelling, statistical correlations and causal-descriptive methods or the development of a framework based on market feedbacks for the application on several policies.