Simon Johnson, MIT Sloan School of Management

The mainstream approach to driverless cars is slow and difficult. These startups think going all-in on AI will get there faster.

The startup used plant matter and bio-oil to sequester thousands of tons of carbon. The question now is how reliable, scalable, and economical this approach will prove.

Google Brain has revealed its own image-making AI, called Imagen. But don't expect to see anything that isn't wholesome.

Some worry that the chatter about these tools is doing the whole field a disservice.