Bionanotechnology: Concepts, historical developments, and applications.- Biogenic nanomaterials: Synthesis, characterization, and applications.- Biogenic synthesis of nanomaterials: Plant diversity.- Biogenic synthesis of nanomaterials: Microbial diversity- Algae, bacteria, fungi, and others.- Biogenic synthesis of nanomaterials: Bioactive compounds as reducing, and capping agents.- Role of bioactive compounds in synthesis of nanomaterials: insights.- Biogenic nanomaterials as antimicrobial agents.- Nanomaterials induced cell disruption: An insight into mechanism.- Nanomaterials in drug delivery.- Biogenic nanomaterials for degradation of organic and inorganic pollutants.- Biogenic nanomaterials as catalyst for photocatalytic dye degradation.- Biogenic nanomaterials as adsorbents for heavy metal remediation.- Biogenic nanomaterials for remediation of Polyaromatic Hydrocarbons.- Biogenic nanomaterials for remediation of pharmaceutical products.- Biogenic nanomaterials for remediation of biocides-insecticides, pesticides and others.- Metal nanoparticles and algal lipid synthesis: An insight.- Metal nanoparticles and microbial (algal) metabolism.- Nanomaterials to enhance algal lipid productivity: Recent advancements.- Biogenic nanomaterials as fuel additives.- Bionanotechnology: Opportunities and challenges.