PLA and PHA are both biodegradable plastics made from corn, tapioca or other renewable resources. They are both produced using a similar process and have many similarities in their properties. PLA is short for polylactic acid, and PHA is short for polyhydroxyalkanoates. Both are thermoplastics that can be used in 3D printing to create strong and durable objects. PLA has a lower melting point than PHA, so it’s easier to print at home with an FDM printer. It also has a higher heat resistance than PHA, so it can create more durable parts when printed at high temperatures (220°C/428°F). PHA has better moisture resistance than PLA, so it’s less likely to warp or break when exposed to moisture over time. This makes PHA a good choice for outdoor applications where PLA might not hold up well under the elements.