The Model 45 hand-held spray nebulizer delivers aerosol particles of uniformly consistent density deep into the lungs. The break-resistant nebulizer easily disassembles for sterilization.

Planet or Plastic? is National Geographic’s multiyear effort to raise awareness about the global plastic trash crisis. Come to this page often to learn more, and find out what you can do to ...

They are made by heating these chemicals at a high temperature. When the plastic is soft it can be poured into a mould. Once the plastic cools, it hardens into a shape. Plastic is a material that ...