davidsantos4253 davidsantos4253
  • 11-01-2020
  • Geography
contestada

Which substance is of great concern to scientists studying human-generated greenhouse gases, and is thought to increase such that the earth's climate will be irrevocably changed by 2020?

A) chlorofluorocarbons

B) carbon dioxide

C) methane

D) nitrous oxide

E) ozone

Respuesta :

colinburns444 colinburns444
  • 11-01-2020

Answer:

C

Explanation:

Answer Link

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