Global change, caused by growing population densities and rising economic production levels, is increasingly placing pressure on scarce land resources. These changes do not always contribute to sustainable development and often increase the pressure on the natural resources that we depend on. Our impact on the environment is immense, and we are fast approaching several tipping points. Without proper management, these environments and the natural resources they provide will be depleted and degraded, sometimes irreversibly. They will no longer be able to provide society with essential services (water, food, carbon sequestration, temperature and rainfall regulation, pest regulation etc.).