1. Lead contamination poses a serious threat to the safety of drinking water m Pennsylvania. This colorless, odorless, and tasteless metal can go undetected m water. Excessive amounts of lead place adults at higher risk for cancer, stroke, kidney disease, memory problems and high blood pressure. Lead in excessive amounts in the drinking water that mainly comes from industrial pollution and has been the major cause of lung cancer. Economy of Akira Island is based completely on either tourism or subsistence level of agriculture, has little or no industry. But inhabitants of the island have shown high incidence of lung Cancer in the last 10 years.
Which of the following can be inferred from the above statements?