Following chapter 3, this chapter takes the next logical step to strengthen the dimensions of secondary agriculture by deliberating on its organic domains, namely bioeconomy and circular economy. As will be seen, these two concepts though seem distinct are complementary to each other. In an organic partnership, these two help in sustaining the economy and ecology by enabling to shift from the non-renewable fossil resources to renewable bioresources. Further, these also help in achieving resource use efficiency and positive climate action by leading to minimisation of greenhouse gases. The discussions would be found enriched by detailed examination of the definitions of circular and bio economies adopted in different countries.