The concepts of NRA and adjusted GDP (green GDP) have for long been debated by economists. This has been mainly due to lack of consensus on how natural resources should be valued. But with traditional indicators of growth like GDP and NNP being increasingly considered inadequate, these concepts are gaining acceptance.
According to experts, GDP calculated the traditional way takes into account depreciation of man-made assets, while depreciation of environmental assets goes unaccounted for. Depletion of natural resources is actually treated as an increase in income, when it could be potentially disastrous for future growth. Also, accounting for degradation costs could result in a much lower GDP, which is the reason why many developed nations are reluctant in adopting the green GDP.
Source: http://www.financialexpress.com/news/green-gdp-to-estimate-depletion/164399/3