Which of the following activities is responsible for the largest percentage of human-made carbon dioxide emissions?

Question

BlackTom AI · Accepted Answer

Question restatement: Which of the following activities is responsible for the largest percentage of human-made carbon dioxide emissions?

Option a: ozone depletion. This choice is incorrect as ozone depletion relates to ozone layer thinning and does not represent a major direct source of CO2 emissions. The processes affecting ozone involve reactive chlorine and bromine in the stratosphere, not large-scale CO2 release.

Option b: deforestation. While deforestation contributes to CO2 emissions (trees and soil store carbon and their removal reduces sequestration, and burning or decomposition releases CO2), its share is smaller than the emissions from burning fossil fuels across energy and transportation sectors.

Option c: acid deposition. Acid deposition results from emissions of sulfur oxides and nitrogen oxides, which cause acid rain. These gases are often produced alongside CO2, but acid deposition itself is not a direct major source of CO2 emissions, making this option incorrect for identifying the largest CO2 source.

Option d: agriculture. Agricultural activities release greenhouse gases such as methane (from enteric fermentation in ruminants and rice paddies) and nitrous oxide (from manure and soil processes). While significant for overall greenhouse gases, the CO2 portion from agriculture is not the largest contributor when considering human-made CO2 specifically.

Option e: burning fossil fuels. This is the correct pathway: burning coal, oil, and natural gas for energy and transportation releases vast amounts of CO2 and is the dominant source of human-made CO2 emissions globally. It encompasses electricity generation, industry, and transportation sectors, which together overwhelm other sources in CO2 output.

Summary of reasoning: The other options describe important environmental issues or other greenhouse gases, or indirect effects, but none account for the majority of CO2 emissions compared with burning fossil fuels, which remains the leading cause of anthropogenic CO2 emissions.

Which of the following activities is responsible for the largest percentage of human-made carbon dioxide emissions?单项选择题

类似问题

What has increased the concentration of Carbon Dioxide (CO2) in the atmosphere?

How much extra CO2 does travel by celebrity jet produce compared to the average American?

According to figure F13-3-5, what are the predicted CO2 emissions in 2050 if the 2 °C emission reduction targets are achieved?

Which energy source currently contributes the most CO2?

Apple’s iPhone XR was the most popular smartphone in the world in 2019. In 2019, 46.3 million iPhone XR units were shipped. How many kg CO2 is released over the lifetime of these 46.3 million iPhone XR units if an iPhone XR is responsible for 62 kg CO2 emission over its lifetime?

Based on the changes of these parameters, what do you think has happened to CO2 emissions?

When looking at the distribution of produced total CO2 emissions in the world it can be concluded that

How great are the annual steel industry's global CO2 emissions compared to total annual anthropogenic CO2 emissions?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单