One method by which excess carbon enters the atmosphere is through emissions by industrial smokestacks.
Suggest a way of reducing the carbon contained in these emissions using a physical change and another way
using a chemical change.

- "the choice that is not an indicator of a chemical change is "state of matter changes". more common than not, chemical reactions produce energy in the form of light or heat. along with energy, they also produce a new substance called the product that could be in any state of matter (solid, gas, or liquid)."

put the answers   and i could answer.

i think its 100.

hope this !