We've been looking at how technology is changing agriculture. Last month, we visited Central California where there's new investment in everything from electric tractors and leaf sensors to upskilling farmworkers.

Today, Marketplace’s Kimberly Adams visits our neighbor to the north. Specifically, Canada's first fully-automated greenhouse. It's cost millions to set up, and it's just in time for a trade war.

AI-generated deepfakes are everywhere on social media. Now, you can take a test developed by Northwestern University to see how well you spot them. Marketplace’s Nova Safo took the test, sifting through a bunch of real and fake images. He got five out of six right, which is the average in a study Northwestern conducted. Lead researcher Matt Groh also helped develop a litmus test, a series of things to look for to spot deepfakes.

On this episode of “Marketplace Tech,” host Meghan McCarty Carino spoke with Christopher Mims, a tech journalist at The Wall Street Journal, about the recent evolution of brain computer interfaces — technology that has enabled people with paralysis to move prosthetic limbs or type out communication using computer implants in their brains — and the neurotech startups trying to bring their implants to a larger market by making them less invasive.