The sustainability of primary resources depends on recycling, resource efficiency and the search for alternative materials [...]

The use of recycling techniques in pavement construction offers significant benefits of resource conservation and emission reduction. While the environmental benefits are generally considered as business expenses, a new trend is to turn sustainable construction into profit. By generating financial revenue via carbon trading mechanism, asphalt producers and road builders can compensate their sus...

A key challenge for the waste management sector is to maximise resource efficiency whilst simultaneously reducing its greenhouse gas (GHG) emissions. For stakeholders to better understand the GHG impacts of their waste management activities and identify emissions reduction opportunities, they need to be able to quantify the GHG impacts of material recycling. Whilst previous studies have been un...

Producing phosphorus (P) fertilizers with recycled P is desirable for efficient use of P resource. However, the current cost of P recycling facilities in Japan strongly discourages the government from adopting this practice. To expand consideration for a P recycling policy, the concept of social externality was introduced. Social issues, such as the violation of human rights in P mining in the ...

We study a system of two integrodifferential equations which models the evolution of a biotic species feeding on an abiotic resource. We also consider nutrient recycling with time delay. By H o p f bifurcation theory we prove the existence of stable oscillations for a range of values of the input of nutrients.

Despite major improvements in recycling over the last decades, the pulp and paper sector is a significant contributor to global greenhouse gas emissions and other environmental pressures. Further reduction of virgin material requirements and environmental impacts requires a detailed understanding of the global material flows in paper production and consumption. This study constructs a Sankey di...