Question

Scientists have found that atmospheric carbon dioxide levels have(1 point) Responses increased from 280 parts per million to over 400 parts per million during the last 150 years. increased from 280 parts per million to over 400 parts per million during the last 150 years. decreased from 400 parts per million to 280 parts per million during the last 200 years. decreased from 400 parts per million to 280 parts per million during the last 200 years. increased from 50 parts per million to over 100 parts per million during the last 150 years. increased from 50 parts per million to over 100 parts per million during the last 150 years. decreased from 280 parts per million to 100 parts per million during the last 150 y

Answer 1

The correct response is: **increased from 280 parts per million to over 400 parts per million during the last 150 years.**

This reflects the significant rise in atmospheric carbon dioxide levels primarily due to human activities such as fossil fuel combustion and deforestation.