cancer-causing chemicals

This is why you need to give up the habit of pen-writing right away
Because really, this habit is much more harmful than you think.
5 'sneaky' perpetrators cause cancer
In carcinogens, the sun is a clear agent, and there are many things that pose a potential cancer risk without your knowledge.
Risk of poisoning from plastic chopsticks and wooden chopsticks
In mid-2013, authorities discovered a disposable bamboo chopsticks that contained levels of cancer-causing chemicals.