Some of the most significant obstacles encountered when integrating sustainable development at the BoP are the limits to growth that restrict the extended development of the poor, especially when applying a resource-intensive Western way of living. Nevertheless, from a normative ethical perspective poverty alleviation is an integral part of sustainable development according to the notion of intragenerational justice (i.e. within the living generation) in the Brundtland Commission's definition. Ongoing research addresses these aspects and widens the BoP approach also by integrating it into corporate social responsibility thinking.[citation needed]