Was a major source...past tense ? don't go by this answer I'd say plants..not sure how specific...lmk and ill answer it if you're still on this
The correct answer for this question would be option B. Greenhouse gases are needed for the survival of life on Earth because without greenhouse gases, Earth would be too cold for life to exist. Hope this answers the question. Have a nice day.
First one, disease causing microorganisms
A leaf is made up of many layers and is surrounded by two. Upper epidermis, mesophyll, bundle sheath, vein, mesophyll, lower epidermis, and guard cells.