Ask Professor Green: Your 24/7 Sorting Expert

Professor Green is your personal LASAN expert, available 24/7 on your smartphone and our website. This clever assistant provides immediate answers to your most common questions about all City bins and services.   

Simply ask, and Professor Green can tell you:

• What goes where: Expert sorting advice for your Blue, Green, Black, and Brown bins.   
• Household Hazardous Waste: How to safely dispose of paint, electronics, and chemicals at a S.A.F.E. Center.   
• Bin Care: Easy tips on how to keep your bins clean and how to request a free repair or replacement if they are broken.   
• Events & Fun: Where to find the next Composting Workshop or community event.   

Getting help from Professor Green is incredibly easy. You can find his special QR codes on our flyers, at local events, and even on our LASAN collection trucks.  When you see one, just scan it with your phone’s camera to start chatting.  

• No App Required: He opens instantly in your mobile browser.   
• Speak Your Language: Professor Green is a global citizen! He speaks 17 different languages.   
• Text the Professor: No camera? No problem! Text "hello LA1" to 213-263-6238 to get answers right on your phone.  
• Chat: Click on the Professor Green Digital Assistant on this page and ask a question!

Properly sorting your waste is a simple action with a huge impact. When we keep food scraps and recyclables out of the landfill, we significantly reduce methane, a powerful gas that affects our climate. By using Professor Green, you are helping us build a more sustainable and healthier Los Angeles for everyone!

We're building a community of environmentally-conscious Angelenos. Follow @lacitysan and @ProfGreenLA on social media for news, events, and tips to keep LA green.