What does al gore, author of An Inconvenient Truth, demonstrate about the level of atmospheric carbon dioxide levels?
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
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.
According to Al Gore, author of "An Inconvenient Truth," the level of atmospheric carbon dioxide (CO2) has been steadily increasing over the past 50 years. Each year, the CO2 level rises and then falls, but overall, it has steadily increased.
To determine what Al Gore, the author of "An Inconvenient Truth," demonstrates about the level of atmospheric carbon dioxide (CO2) levels, we can refer to the information given.
According to the choices provided, the correct answer is: Each year, the CO2 level rises and then falls. Over the past 50 years, it has steadily increased.
To understand this, we can break it down:
1. "Each year, the CO2 level rises and then falls": This means that over a given period (each year), the CO2 level experiences an increase followed by a decrease. This indicates a cyclical pattern.
2. "Over the past 50 years, it has steadily increased": This refers to the overall trend of CO2 levels over the past half-century. Despite the cyclical pattern mentioned earlier, the trend for the past 50 years has been a consistent increase - meaning the peaks of each cycle have been higher than the previous ones.
By combining these two pieces of information, we can conclude that Al Gore's observations and the data presented in "An Inconvenient Truth" demonstrate that the atmospheric CO2 levels have been steadily increasing over the past 50 years, with an annual cycle of rising and falling.