HOW TO GET
Between manual gathering and Litter specialists, keeping Nonburnable Garbage stocked isn't hard. The Litter route is less effort once you've assigned the right Pokemon to the job.
How to get Nonburnable Garbage: find it in Bleak Beach on the ground. You can also get it from Litter Pokemon passively.
Explore Bleak Beach
Keep an eye out for Nonburnable Garbage on the ground while you explore.
Pick up Nonburnable Garbage
Grab it off the ground to add it to your inventory.
Wait for drops
The Pokemon will periodically drop Nonburnable Garbage nearby.
Collect Nonburnable Garbage
Pick up the litter drops from the ground.
Litter HelpersAssign one of these Pokemon to keep Nonburnable Garbage stocked up.
NONBURNABLE GARBAGE HABITAT RECIPES
Gathering Nonburnable Garbage feeds into 1 recipe that habitats like Trash Collection Site, Trash Disposal Site, and Trash Site TV depend on. Each recipe you craft brings you closer to attracting Pokemon like Koffing, Weezing, Trubbish and 4 more.
x1
Sign (any)
Recycle 
Chop 
Search 
Gather 
Trade POKOPIA NONBURNABLE GARBAGE CRAFTING RECIPES
You can craft Garbage bags, Scrap Cube using Nonburnable Garbage. These 2 recipes are mostly Furniture and Blocks items that help fill out your island.
Nonburnable Garbagex1
Iron Ore
Copper Ore