How do you relate sustainable development with social justice and how do you develop a unit lesson which the content is the relationship between those two concepts. Social justice is simply defined as an equal opportunity for people to have better life. It is a part of sustainable development aspects, namely social aspect. Social development is central […]

Say one meter of a trunk produces for 500 paper sheets at Rp. 37,000 of sale price and the total production cost, say Rp. 20/sheet or Rp 10,000/500 sheets).  Simply, the paper production has met an eco-efficient concept but it heavily depends on the application of technology. To illustrate the eco-efficiency practice of such paper […]