Climate Change — Set 5
Environment · जलवायु परिवर्तन · Questions 41–50 of 60
What is the primary greenhouse gas emitted through human activities like burning fossil fuels?
Correct Answer: B. Carbon Dioxide
Carbon dioxide (CO2) is the most significant greenhouse gas contributing to global warming. It is released during the combustion of coal, oil, and natural gas. Reducing CO2 emissions is the main focus of most international climate policies.
Which international agreement was adopted in 2015 to combat climate change globally?
Correct Answer: C. Paris Agreement
The Paris Agreement is a landmark treaty where nearly every nation agreed to reduce greenhouse gas emissions. Its main goal is to limit global temperature increase to well below 2 degrees Celsius. It also aims to strengthen the ability of countries to deal with climate impacts.
Which gas is produced naturally by the digestive systems of cattle and contributes to global warming?
Correct Answer: B. Methane
Methane is a powerful greenhouse gas released during the digestion process of livestock like cows and sheep. While it stays in the atmosphere for a shorter time than CO2, it is much more effective at trapping heat. Livestock farming is a major human-related source of methane emissions.
What happens to sea levels as global temperatures rise?
Correct Answer: C. They rise
Sea levels rise due to the melting of polar ice caps and glaciers as the Earth warms. Additionally, warmer water expands in volume, further increasing the sea level. This poses a significant threat to coastal cities and low-lying islands.
Which organization publishes reports on climate change and is known as the IPCC?
Correct Answer: B. IPCC
The Intergovernmental Panel on Climate Change (IPCC) provides regular scientific assessments on climate change. These reports help governments develop policies to protect the environment. The IPCC was established by the United Nations in 1988.
What is the main cause of the 'Greenhouse Effect'?
Correct Answer: B. Trapping of heat by atmospheric gases
The greenhouse effect occurs when certain gases in the atmosphere trap heat that would otherwise escape into space. This natural process is essential for life, but human activities have intensified it. This extra heat is what leads to global warming.
Which of the following is a renewable energy source that helps reduce carbon emissions?
Correct Answer: C. Solar Power
Solar power is a clean and renewable source of energy obtained from the sun's radiation. Unlike fossil fuels, it does not produce greenhouse gases during electricity generation. Switching to solar energy is a key strategy for mitigating climate change.
What term is used for the process of planting trees to absorb carbon dioxide from the air?
Correct Answer: B. Afforestation
Afforestation involves planting trees in areas where there were none previously to create a forest. Trees act as natural carbon sinks by absorbing CO2 during photosynthesis. This is one of the most effective natural methods to fight climate change.
Which sector contributes the most to global greenhouse gas emissions?
Correct Answer: B. Energy
The energy sector, which includes electricity and heat production, is the largest source of emissions. This is primarily due to the heavy reliance on burning fossil fuels globally. Improving energy efficiency is vital for reducing the global carbon footprint.
What is the 'pH' of the ocean doing as it absorbs more carbon dioxide?
Correct Answer: B. Decreasing
The correct answer is 'Decreasing'. As the ocean absorbs CO2, it becomes more acidic, causing its pH level to decrease. This process, known as ocean acidification, can harm marine life like corals and shellfish. It is often called the 'other CO2 problem' alongside global warming.