1. Scientists are Interested in whether certain greenhouse gases have helped cause I recent temperature increases. The graph presents data on carbon dioxide and methane gas levels in the atmosphere for the past several centuries. Human activities began producing large quantities of both gases in the 1700s. This graph, combined with information from--------------------, supports ----------------------.
Answer: B, C
This graph, combined with information from paragraph 3, supports the anthropogenic climate change model.
The data on carbon dioxide and methane levels, particularly the increase due to human activities since the 1700s, strongly supports the anthropogenic climate change model. This model explains that human actions, such as burning fossil fuels, are the primary drivers of recent temperature increases.
A) The Milankovitch climate change model
While the Milankovitch model explains natural climate variations due to changes in Earth's orbit, it does not account for the rapid increase in greenhouse gases like CO2 and methane resulting from human activities. Therefore, this option does not align with the context of the question regarding recent temperature increases.
B) paragraph 3
This option is correct as paragraph 3 discusses the significant role of human activities in increasing greenhouse gas levels, particularly CO2, and how these levels correlate with rising temperatures. This information directly supports the assertion that recent temperature changes are primarily due to anthropogenic factors.
C) The anthropogenic climate change model
This is the second correct option as the anthropogenic climate change model provides a comprehensive explanation for the recent rise in temperatures, emphasizing the impact of human activities on greenhouse gas emissions. The model aligns with the data presented in the graph regarding the increase in CO2 and methane since the 1700s.
D) Paragraph 2
While paragraph 2 discusses climate changes and Milankovitch cycles, it does not focus on the recent human contributions to greenhouse gases or their link to temperature increases. As such, it does not support the current context as effectively as paragraph 3 does.
Conclusion
The correct answer combines information from paragraph 3 with the anthropogenic climate change model to effectively explain the recent temperature increases attributed to human activities. The other options either do not provide relevant context or fail to directly connect to the recent data presented, thereby reinforcing the significance of human impact on climate change.