Answer: 30 years
Explanation: what is 30 plus 30... 60 it says he died in 1930 and discoverd the thing in 1960 add 30 boom its been 30 years
Answer:
Una respuesta es una contestación a alguien que nos llama o nos requiere
Explanation:
From all of the things to choose the one that isnt negative in its way is B. releases carbon
