1. Recent trend in photodegradation of organic pollutants: Bibliometric analysis of researches on photocatalysis for environmental abatement2. Recent trend in degradation of organic pollutants by using various kinds of catalysts3. Carbon and titanium based catalysts for environmental pollution abatement4. Photocatalytic degradation of petrochemical pollutants5. Photodegradation of pesticide6. Photodegradation of pharmaceutical waste7. Photodegradation of EDC8. Photodegradation of dye compound9. Recent Advancement in synthesis of photocatalysts10. Factors responsible for photodegradation of organic pollutants11. Advancement and modification in photo reactors used for degradation processes12. Effect of spent Nano-catalysts on plants13. Effects of unused Nano-catalysts on soil microbiology14. Effects of Nano-catalysts on agriculture ecosystem15. Effects of Nano-catalysts on aquatic ecosystem16. Effects of Nano-catalysts on seed germination of various plants