Secondary organic aerosol formation for the reaction between ozone and limonene (emitted from lemon skin). <br /> <br />1 - A UV light is turned on to produce ozone from oxygene <br />2 - A green laser is used to check that no (or little) aerosol is present in the glass flask <br />3 - A piece of lemon skin is introduced in the flask <br />4 - The aerosol appears like a very thin fume that will now scatter the beam of the laser
