D
Methane gas is more potent( roughly by 30 times), as a greenhouse gas than carbon dioxide. 
Explanation:
Greenhouse gases in the atmosphere trap infrared radiation (responsible for the transfer of heat) that reflects off of the earth's surface instead of allowing most of this radiation to escape to space. This causes heat to build up in the atmosphere. The more the greenhouse molecules are in the atmosphere the higher this effect is. Global warming is subsequently blamed for climate change around the world. 
Learn More:
For more on greenhouse effect check out;
brainly.com/question/12773811
brainly.com/question/1313095
#LearnWithBrainly
 
        
                    
             
        
        
        
Answer:
Preventive maintenance is where measure are taken beforehand so that the chances of breakdown are minimised resulting in increased efficiency of machines. It is the maintenance that is regularly performed on any equipment to lessen the likelihood of it failing.
Explanation:
Answer from Gauth math
 
        
                    
             
        
        
        
Reduce amount of time you take showers and use the bathroom, as well as stop leaks
        
                    
             
        
        
        
Answer:The hypothesis that eukaryotic cells evolved from a symbiotic association of prokaryotes—endosymbiosis—is particularly well supported by studies of mitochondria and chloroplasts, which are thought to have evolved from bacteria living in large cells.
Explanation: