Tree Hugger listed its top 10 most popular items from the year, which included this one about the best to plants to grow for purifying the air. This is based on studies by NASA. The list tells the best house plants for producing oxygen from CO2 and also for absorbing benzene, formaldehyde and/or trichloroethylene. NASA came up with another list for plants to filter formaldehyde, xylene and toluene. One of the authors of the study wrote this book.
The use of drones has exploded, so to speak, with Obama in office. Jane Mayer wrote an excellent article about the issue in the New Yorker a few weeks back. There’s also a shorter interview with Mayer here.