(a) Formed through photosynthesis
(b) Caused by heat due to the large mass of the earth
(c) Has been used for only a few years
(d) is effective in only certain regions of the United States
[xyz-ihs snippet=”environment-mcqs”]
(a) Formed through photosynthesis
(b) Caused by heat due to the large mass of the earth
(c) Has been used for only a few years
(d) is effective in only certain regions of the United States
[xyz-ihs snippet=”environment-mcqs”]