Answer:
1. Global warming / carbon emission
2. Limited availability of the Earth resources 
Step-by-step explanation:
1. Global warming is the ongoing rise of the average temperature of the Earth's climate system and has been demonstrated by direct temperature measurements and by measurements of various effects of the warming. It is a major aspect of climate change which, in addition to rising global surface temperatures, also includes its effects, such as changes in precipitation. The global warming is as a result of carbon emissions caused largely by fossil fuel 
2. Limited availability of earths resources as warranted the need to source for alternative means of energy 
 
        
             
        
        
        
Answer:
x=2
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Im sorry im not sure how to do this either lol :/
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Answer:
The correct answer for this problem is the 2nd one because all you have to do is count how far each one is from -1 and -2
Step-by-step explanation:
 
        
                    
             
        
        
        
 The time taken by the two men will be equal to 26 hours
<h3>What is speed?</h3>
The speed is defined as the ratio of the time distance traveled by the body to the time taken by the body to cover the distance.
here two men are walking at different speeds like 
v₁=6 miles per hour
v₂=10 miles per hour
The time taken by them to separated by the distance of 100 miles each so that both of them separated by the distance of 200 miles.
t₁= {100}/{6}=16.66 hours
t₂= {100}/{10}=10 hours
total time taken will be 
t₁+t₂=16.66+10=26.66 hours
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