Which is not a source of carbon dioxide gas? plants, factories, machines, humans

The correct answer is option A, Plants

Explanation:

Plants are the only species that take up the carbon dioxide and produces oxygen through the process of photosynthesis. They do not release CO2 directly into the environment. While human take up oxygen and produces carbon dioxide which is exhaled out through respiration. The factories and machine uses fossil fuels rich in carbohydrate which on burning produces carbon dioxide as an exhaustive gas.

i dont know this but ask your teacher for !

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.