You are presented with the question "Burning coal worsens" and the following answer choices: 
- global warming
 - torn tendons
 - gender inequality
 - energy usage
 - Dehydration
 - Abnormal cell growth
 - The atmosphere
 - sound reproduction

Now knowing that coal is used to produce electricity by burning in coal-fire power stations and coal-fired power plants also contribute heavily to global warming, choose the best answer.


 

 global warming        