You are presented with the question "What does carbon dioxide cause?" and the following answer choices: 
- skateboards
 - Greenhouse gases
 - Worldwide temperature increase
 - major threat to health
 - direct damage to the lungs
 - running
 - a lot of human deaths
 - Temperature decrease

Now knowing that global warming is when worldwide temperature increases and global warming is caused by carbon dioxide trapped in the atmosphere, choose the best answer.


 

   Worldwide temperature increase      