Which is TRUE of the level of CO₂ in our atmosphere?

Name: Which is TRUE of the level of CO 2 in our atmosphere?
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Question

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The level of CO₂ in our atmosphere reached 400 ppm in 2013, as reported by multiple sources including NASA and NOAA. The other choices are false: A) The level of CO₂ is actually increasing, not decreasing; B) The rate of increase has not leveled out but rather continues at an alarming rate; and D) The level of CO₂ was lower in 1955 than it is today.

Which Is TRUE of the Level of CO2 in Our

Which Is TRUE of the Level of CO₂ in Our