![teaaaars.png](https://steemitimages.com/DQmd2kogTKXXVvvivbSgXX6umLczMeLhbVM8nfzFjE5PXb9/teaaaars.png)

Do you know how much saliva your body produces? How many tears do you shed when you cry? You just wipe those tears away or they dry out on your cheek. But what if they could be put to a better use? As most of the traditional methods of producing electricity has been proven to be harmful to the environment and the fossil fuels depleting at the rate they are depleting now, scientists are trying to use unconventional methods to generate electricity.   
 
An enzyme called lysozyme which is present in our tears and saliva can be a source of electricity when it is under pressure. When a film on lysozyme crystal is compressed between two slides of glass, the crystal generates electricity. This kind of electricity is called piezoelectricity. While lysozyme crystals are not the only crystals that generate piezoelectricity, what sets this apart from the others is that it is natural. Lysozyme can be found not only in tears and saliva, but also in mucus, egg whites and milk.  
 
Lysozyme crystals are almost as efficient as quartz in producing piezoelectricity. However, unlike quartz, lysozyme is readily available and is biodegradable. There are implants that release drugs in a patient's body in a controlled and timely manner. Sensors that can detect the lysozyme present in the body can be used to power these implants. The project is in experimental stages now. However, if implemented successfully, it has the potential to replace quartz as a source of piezoelectricity.