What is the effect of blackboard chalk dust on a person's health if there's exposure of the dust regularly to a human through their eyes, nose, mouth and skin? - Quora
![THE CHALK. WHAT IS CHALK? Chalk is a form of limestone that is distinguished by its relative purity and close, fine grain. Humans have been using it for. - ppt download THE CHALK. WHAT IS CHALK? Chalk is a form of limestone that is distinguished by its relative purity and close, fine grain. Humans have been using it for. - ppt download](https://images.slideplayer.com/27/9147361/slides/slide_3.jpg)
THE CHALK. WHAT IS CHALK? Chalk is a form of limestone that is distinguished by its relative purity and close, fine grain. Humans have been using it for. - ppt download
What is the effect of blackboard chalk dust on a person's health if there's exposure of the dust regularly to a human through their eyes, nose, mouth and skin? - Quora
![From chalk dust to airborne particles: How polluted air in classrooms is affecting students - Times of India From chalk dust to airborne particles: How polluted air in classrooms is affecting students - Times of India](https://static.toiimg.com/thumb/imgsize-23456,msid-106030465,width-600,resizemode-4/106030465.jpg)
From chalk dust to airborne particles: How polluted air in classrooms is affecting students - Times of India
![Investigation of fine chalk dust particles' chemical compositions and toxicities on alveolar macrophages in vitro - ScienceDirect Investigation of fine chalk dust particles' chemical compositions and toxicities on alveolar macrophages in vitro - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0045653514010704-fx1.jpg)
Investigation of fine chalk dust particles' chemical compositions and toxicities on alveolar macrophages in vitro - ScienceDirect
![Which is less healthy -- chalk dust from excessive blackboard use, or marker fumes from excessive whiteboard use? : r/AskScienceDiscussion Which is less healthy -- chalk dust from excessive blackboard use, or marker fumes from excessive whiteboard use? : r/AskScienceDiscussion](https://b.thumbs.redditmedia.com/VXukRtebQAtdj6BUMLlOjCh3XnLH9_oScHxsDJ-vsio.png)
Which is less healthy -- chalk dust from excessive blackboard use, or marker fumes from excessive whiteboard use? : r/AskScienceDiscussion
![From chalk dust to airborne particles: How polluted air in classrooms is affecting students - Times of India From chalk dust to airborne particles: How polluted air in classrooms is affecting students - Times of India](https://static.toiimg.com/thumb/resizemode-4,width-1280,height-720,msid-106030472/106030472.jpg)