Techie Nurse Chatting Tesla Ventilator, How To Make A Mask — CleanTechnica Top 20 In April

April flew by, right? Oh, no, never mind — April was 8 years stuffed into one calendar month. Looking back on the top CleanTechnica articles of the month, some feel like they were an era ago. It's also weird that the top 3 were about ventilators, masks, and motorcycles. What a month