Intro -- Nano-enabled Agrochemicals in Agriculture -- Copyright -- Contents -- Contributors -- Chapter 1: The role of nanotechnology to combat major recent worldwide challenges -- 1. Recent problems and efforts towards their solution -- 1.1. Coronavirus disease (COVID-19) pandemic -- 1.2. Environmental crisis due to fossil fuels combustion -- References -- Chapter 2: Classification of nanomaterials and their physical and chemical nature -- 1. Introduction -- 2. Origin -- 3. Classification of nanostructures -- 3.1. According to dimensions -- 3.1.1. Zero dimensional (0D) -- 3.1.2. One dimensional (1D) -- 3.1.3. Two dimensional (2D) -- 3.1.4. Three dimensional (3D) -- 3.2. According to composition -- 3.3. Structural classification of nanomaterials -- 3.4. According to morphology -- 4. Various phenomena that affect the properties of nanomaterials -- 4.1. Quantum confinement -- 4.2. Surface plasma resonance -- 4.3. Quantum coherence -- 4.4. Surface/interface effects -- 5. Properties of nanomaterials -- 5.1. Physical properties -- 5.2. Chemical properties -- References -- Chapter 3: The theory of relativity effect in nanoparticles: Deciphering of unknown effects with nano-puzzle and nano-d -- 1. Introduction -- 2. Unknown effects and gaps -- 3. The theory of relativity effect -- 4. Nano-puzzle as a new concept and strategy in nanotechnology -- 5. Domino effect or chain effect theory in NPs (Nano-domino) -- 6. Hypothetical experiment design for relativity theory effect -- 7. Conclusions -- References -- Further reading -- Chapter 4: Eco-friendly routes for obtaining nanoparticles and their application in agro-industry -- 1. Benefits and risks of nanoparticles -- 2. Synthesis of nanoparticles: Bioinspiration, biomimetics, or allowing nature do the work -- 3. NPs come from nature and to nature they shall return.