the graph shows the amount of carbon dioxide (co₂) emissions per year over time. students learn that carbon…

the graph shows the amount of carbon dioxide (co₂) emissions per year over time. students learn that carbon dioxide is a greenhouse gas that contributes to climate change. they want to identify the sources of carbon dioxide emissions in order to make a plan to reduce their towns impact on climate change. which two processes contributed most to the changes in carbon dioxide concentrations since 1985? a. respiration of a growing population b. transportation of goods and people c. manufacturing of materials like cement d. development of renewable energy sources e. expansion of public transportation services

the graph shows the amount of carbon dioxide (co₂) emissions per year over time. students learn that carbon dioxide is a greenhouse gas that contributes to climate change. they want to identify the sources of carbon dioxide emissions in order to make a plan to reduce their towns impact on climate change. which two processes contributed most to the changes in carbon dioxide concentrations since 1985? a. respiration of a growing population b. transportation of goods and people c. manufacturing of materials like cement d. development of renewable energy sources e. expansion of public transportation services

Answer

Brief Explanations:

Respiration of a growing population contributes a small - constant amount of CO₂. Transportation of goods and people, especially with fossil - fuel based vehicles, emits large amounts of CO₂. Manufacturing of materials like cement is a major industrial source of CO₂. Development of renewable energy sources reduces CO₂ emissions. Expansion of public transportation services can reduce CO₂ if it replaces private fossil - fuel vehicle use. Since 1985, transportation and manufacturing have been major contributors to rising CO₂ levels.

Answer:

B. transportation of goods and people C. manufacturing of materials like cement