Answer:
The lowest CO2 concentration on Earth right now is around 180 parts per million (ppm). This level was recorded in Antarctic ice cores from the past million years. The current average CO2 concentration in the Earth's atmosphere is about 416 ppm. This level has been increasing steadily since the Industrial Revolution, and is now higher than at any other time in human history. The increase in CO2 concentration is due to human activities such as burning fossil fuels and deforestation. These activities release CO2 into the atmosphere, which traps heat and contributes to climate change.
Step-by-step explanation: