Answer
For organic and eco-friendly products, the Saturday Walking Street Market is a must-visit. Vendors here often focus on sustainable practices and offer everything from organic food to eco-friendly crafts.
• Also, check out local health food stores like 'Pun Pun Organic Vegetarian Restaurant' which has a small shop selling organic produce and eco-friendly products. It's a favourite spot for health-conscious locals.
• Lastly, you might want to explore the various organic farms in the surrounding areas, where you can buy fresh produce directly from the source and support sustainable agriculture.
Practical Chiang Mai planning note: Choose by location, dietary needs, hygiene, atmosphere and the time you plan to visit rather than relying on a single "best" list. Menus, opening days and stall locations change, especially at markets and seasonal venues.