To analyze tiny amounts of liquids, scientists often use devices called microfluidic chips, which are small pieces of plastic that are etched or molded with miniscule channels. Although these single-use chips are small, their widespread use in labs, hospitals and point-of-care situations adds up to a lot of plastic pollution. Therefore, researchers reporting in ACS’ journal Analytical Chemistry have developed versatile microfluidic chips made of a renewable, biodegradable and inexpensive resource –– wood.