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"Wicked problems" are complex to understand and challenging to teach. Our experience of teaching about environmental concerns in Aotearoa New Zealand suggests how these concepts are taught is more important for student learning than the nature of wicked problems themselves. By offering opportunities for students to co-develop their own situated knowledges about wicked problems, they can conceptualise and tackle them more effectively at their own pace and in their own experiential contexts. Here we identify and discuss approaches to teaching and learning that can be effectively applied to any wicked problem. We demonstrate a hopeful way to teach and learn about unwieldy and overwhelming issues that many of today's undergraduates will inevitably be expected to confront in the future. This paper provides aframework to engage students in acourse, and tools for engendering active participation insituated and tangible learning experiences when teaching wicked problems. As lecturers teaching in aSchool of Environment in the disciplinary areas of geography, environmental science, science communication, and sustainability, we discuss the value and applications of these ideas across three levels of undergraduate teaching. We identify challenges that we have experienced and show how it is possible to turn these challenges into opportunities. [ABSTRACT FROM AUTHOR]

This review of the epidemiological literature shows that evidence for negative impacts of land contaminated by waste disposal on human health is limited. However, the potential for health impacts cannot be dismissed. The link between residence close to hazardous waste disposal sites and heightened levels of stress and anxiety is relatively well established. However, studies on self-reported outcomes generally suffer from interpretational problems, as subjective symptoms may be due to increased perception and recall. Several recent multiple-site studies support a plausible linkage between residence near waste disposal sites and reproductive effects (including congenital anomalies and low birth weight). There is some conflict in the literature investigating links between land contamination and cancers; the evidence for and against a link is equally balanced and is insufficient to make causal inferences. These are difficult to establish because of lack of data on individual exposures, and other socioeconomic and lifestyle factors that may confound a relationship with area of residence. There is no consistently occurring risk for any specific tumor across multiple studies on sites expected to contain similar contaminants. Further insights on health effects of land contamination are likely to be gained from studies that consider exposure pathways and biomarkers of exposure and effect, similar to those deployed with some success in investigating impacts of cadmium on human health. [ABSTRACT FROM AUTHOR]

A review of the epidemiological literature on the potential effects of land contamination shows that the largest body of contaminant-specific research relates to cadmium (Cd). First, a brief outline of the key issues related to the study of health impact of land contamination is presented. The recent literature is then reviewed for evidence of associations and possible causal relationships between exposure to Cd from land contamination and health impact. A large number of studies focusing on Cd arise because of the ready availability of biomarkers of exposure and effect and the demonstrated link between soil Cd and itai-itai disease (severe renal and bone disorders) via dietary exposure in Japan and China. Where dietary differences yield lower exposures, links have been established between Cd in soil and biomarkers of renal or bone dysfunctions, but not to health impacts per se. Potential effects of Cd exposure were also investigated for other health outcomes, including hypertension, cancer incidence, preterm delivery, and semen parameters. In contrast to renal and bone disorders, results are generally inconsistent and require further lines of evidence. Residence in locations with elevated concentrations of Cd in soil is a poor surrogate for exposure, and there are examples where residents in locations with elevated concentrations of Cd in soil did not appear to suffer serious health consequences. [ABSTRACT FROM AUTHOR]