A new study published in PLOS ONE in August suggests residents in southwestern Pennsylvania surrounded by oil and gas facilities may suffer from more health complaints, according to EOS.

People living near oil and gas wells in southwestern Pennsylvania reported sore throat, burning eyes, headaches and more to researchers.

Researchers estimated exposure to oil and gas emissions and used a novel method to assess potential health consequences related to a specific exposure level. The study doesn’t prove cause and effect, but showed people surrounded by more wells were more likely to suffer from more symptoms.

Learn more: EOS > More gas wells linked to more symptoms in Pennsylvania residents