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A numerical model was developed to comprehensively predict greenhouse gas (GHG) emissions from water resource recovery facilities. An existing activated sludge model was extended to include a nitrifier-denitrification process and carbon dioxide (CO₂) as a state variable. The bioreactor model was coupled to a process-based digester model and an empirical model of indirect CO₂emissions. Direct emissions were approximately 90% of total GHG emissions for a plantwide simulation using the Modified Ludzack-Ettinger process. Biogenic CO₂, nitrous oxide (N₂O), and methane (CH₄) represented 10, 43, and 34% of total emissions. Simulating a dissolved oxygen controlled closed-loop system reduced both sensitivity and uncertainty of GHG emissions. Nitrous oxide emissions were much more sensitive under different design and operating conditions compared to CH₄and CO₂, indicating a significant mitigation potential. An uncertainty analysis found that the uncertainty in GHGs emissions estimates could be significant. Nitrous oxide emissions dominated in both magnitude and uncertainty.

The ‘graying’ of Australia's population has generated much debate within government, demographic, health and social service circles in recent times. Current and projected shifts in population structure towards greater numbers of ‘dependent’ populations raise a number of complex issues in regard to resource allocation in both income support and service provision. Service issues revolve around questions of whether public or private provision will resolve the care issues for dependent elderly people. It is argued that contrary to popular opinion, family care is well entrenched within the framework of social care, and that the solution of community care, posited in relation to the rising levels of chronic illness and dependency within the elderly population, is actually an attempt to place more responsibility of care on to the family. It is further suggested that family care is, in fact, care by women who themselves are in a state of dependency. Citing evidence from a study conducted by the authors, the paper argues that family care imposes heavy burdens upon women and families and suggests that social policy should, firstly, actively bolster family care through the provision of supportive and supplementary services; and secondly, broaden its intent by exploring other options of care for elderly people. The latter response is important because without it, family care will only help to reinforce and sustain the dependent status of women.