Human-produced biosolids are a low-cost source of nutrient-rich organic matter that is often spread on agricultural land rather than being sent for incineration or landfill disposal. Opponents of land application of biosolids are concerned about the potential health impact of heavy metals, bacteria, and drugs that may remain in the biosolids.

Your task is to research ONE of the questions below and evaluate the health issues that arise from the impact of human activities on the environment.

Questions to Consider

• In what ways have mining, forestry, and hydroelectric developments affected the health of Aboriginal people in Northern Ontario?
• What are the links between air pollution and respiratory diseases such as asthma?
• What types of human activity have led to the thinning of the ozone? What human health conditions are related to this phenomenon?