What does al gore, author of An Inconvenient Truth, demonstrate about the level of atmospheric carbon dioxide levels?

Question

Each year, the CO2 level rises and then falls. Over the past 50 years, it has steadily increased
Each year, the CO2 level increases at a faster rate. Over the past 50 years, it has nearly doubled
Each year, the CO2 level decreases. Over the past 50 years, it has steadily decreased

Answer 1

The first option, "Each year, the CO2 level rises and then falls. Over the past 50 years, it has steadily increased," aligns more closely with Al Gore's message in "An Inconvenient Truth." Al Gore highlights the steady increase in atmospheric carbon dioxide levels over the past few decades as a cause for concern and a driver of climate change.