1. ACS Green Chemistry & Engineering conference. I have learnt and explored how green chemistry and artificial intelligence (AI) have been used to design and optimise chemical reactions, particularly the talks from agrochemical industries such as Syngenta, Bayer, Corteva and FMC were most valuable for me because I experienced for the first time was that the combination of AI and green chemistry could be used to design greener pesticide and fertiliser. A new and sustainable way is to identify sustainable reaction conditions and eliminate the use of hazardous solvents first. The efficiency of the chemical reaction were optimised later. These learnings were very useful for NanoSoils to initiate AI and green chemistry in Australia to design green nanoagrochemical formulations for cotton. 2. Nanoscale Science and Engineering for Agriculture and Food Systems conference discussed how nanotechnology were applied for agriculture. Surprisingly, the applications have been explored intensively at both academic and industrial levels across the globe. Some of nano-fertiliser and nano-pesticide products have already been in the market. An impressive talk was from an European Food Safety Authority - Reinhilde Schoonjans. She started by asking the audients “raise your hand if you want nanoparticles in your foods”. Of course, no one raised hands. Then she said “either you liked it or not, the nanoparticles have been already added to your foods. I had to double check what she said and found that in fact we consumed about 1.8 mg of silica nanoparticles/kg body weight a day (J Nanobiotechnol 22, 45 (2024). I also had the opportunity to have a chat with U.S. Food and Drug Administration (FDA) officer-Raymond Briñas. He is very supportive the nanomaterials to be used in agriculture and food as long as the products satisfy the regulatory requirements.