Fact 1: Coal is used to produce electricity by burning in coal-fire power stations.

Fact 2: Coal-fired power plants also contribute heavily to global warming.

Given the two facts above, answer the question "Burning coal worsens" with the following options: 
- global warming
 - torn tendons
 - gender inequality
 - energy usage
 - Dehydration
 - Abnormal cell growth
 - The atmosphere
 - sound reproduction


 

 global warming        