1. Metal Toxicity and Resistance in Plants and Microorganisms in Terrestrial Ecosystems.- 2. Heavy Metal Threats to Plants and Soil Life in Southern Africa: Present Knowledge and Consequences for Ecological Risk Assessment.- 3. Phytoremediation of Heavy Metal-Contaminated Sites: Eco-environmental Concerns,Field Studies, Sustainability Issues, and Future Prospects.- 4. Snakes as Novel Biomarkers of Mercury Contamination: A Review.- 5. Current Scenario of Pb Toxicity in Plants: Unraveling Plethora of Physiological Responses.