Simplify the following text for a Grade 13 native English-speaking person.
Original: ; Chemical pneumonia Chemical pneumonia ( usually called chemical pneumonitis ) is caused by chemical toxicants such as pesticides , which may enter the body by inhalation or by skin contact .
Simplified: Chemical pneumonia ( usually called chemical pneumonitis ) is caused by chemical toxins such as pesticides , which may enter the body by inhalation or by skin contact .