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29 Oct 2020

6. Fill in the blanks. After all, _______________________ have historically been the primary contributors to greenhouse warming by burning fossil fuels—and still are today.

a. low-income countries

b. high-income countries

c. middle-income countries

d. developing countries 

 

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Raushan Raj
Raushan RajLv8
29 Oct 2020

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