...........<span>Panama..............
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Answer:
using concrete words
Explanation:
A concrete word can be regarded as 
 term used in identification of things/event which is measurable or can be observed. The term are used to describe tangible characteristics/ quality. Examples are 'deep spruce green' , '30 degrees'. All these refers to those things that we can experience by physical senses. It should be noted that a speaker can increase an audience's understanding by using concrete words
 
        
             
        
        
        
I believe that the answer is that Carbon dioxide ( CO2 ) is still , building up in the atmosphere because we are still burning fossil fuels ( coal, oil and natural gas ) which emits CO2, and we are still cutting down trees which will not remove CO2 from the atmosphere. The natural carbon cycle is unable to remove all the extra CO2 , maybe only 60% of it , so the carbon is building up in the atmosphere and causing global warming .