By working closely together, aerodynamicists and designers can determine the precise shape of the various bits of the car's body needed to ensure that the air slows down on all upper surfaces but speeds up on the under surfaces.

ECONOMIST: CAR DESIGN

"Mould (on plants) can irritate asthma, increase upper respiratory problems, cause headaches and affect concentration, " Dr. David Miller an expert on indoor air quality from Carleton University, Canada told the Globe and Mail newspaper.

CNN: Office foliage for feel good factor