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

Question

Quizplus · Accepted Answer

The current level of CO2 in our atmosphere is over 386 ppm (parts per million). This is considered to be high compared to pre-industrial levels (~280 ppm).

Option B is incorrect as the rate of increase has been steadily increasing over the years.

Option C is also incorrect because the measurements show that the level of CO2 in 1955 was around 315 ppm, which was lower than the current level.

Option D is also incorrect as the level of CO2 is increasing at a rate of around 2 ppm per year.

Option E is not accurate as passing a threshold level of CO2 can have significant impacts on the Earth's climate and ecosystems.

Which Is True of the Level of CO₂ in Our