1. Introduction 2. Synthesis and emission of VOC in plants 3. Biogenic VOC in response to environmental stresses 4. Exploiting biogenic VOC in future agricultural practices 5. Biogenic VOC and air pollutants: ozone and secondary organic aerosol (SOA) 6. Effects of Biogenic VOCs on cloud formation and properties 7. Interactions between emissions of biogenic VOC and climate change at the global scale