Q: Which of the following gases is NOT considered a primary greenhouse gas?
Answer: Nitrogen
Explanation: Nitrogen makes up 78% of our atmosphere but does not trap heat like greenhouse gases. Greenhouse gases like CO2 and Methane are much less abundant but have a massive impact on temperature. Oxygen is also not a greenhouse gas.
Q: The term 'Carbon Footprint' refers to?
Answer: Total greenhouse gases caused by an entity
Explanation: A carbon footprint is the total amount of greenhouse gases produced by human activities. It is usually measured in tons of carbon dioxide equivalent per year. Individuals and companies calculate it to understand their impact on the climate.
Q: What is the primary role of the ozone layer in the atmosphere?
Answer: To block ultraviolet radiation
Explanation: The ozone layer protects life on Earth by absorbing most of the sun's harmful ultraviolet (UV) radiation. Thinning of this layer can lead to health issues like skin cancer and cataracts. It is located in the stratosphere, above the layer where weather occurs.
Q: Which continent is warming at a rate much faster than the global average?
Answer: Arctic/Antarctica
Explanation: The polar regions, particularly the Arctic, are experiencing warming at twice the global rate. This phenomenon is known as polar amplification. The rapid melting of ice in these areas has global consequences for sea levels and weather patterns.
Q: Which conference resulted in the 'United Nations Framework Convention on Climate Change' (UNFCCC)?
Answer: Rio Earth Summit
Explanation: The 1992 Earth Summit in Rio de Janeiro was a major breakthrough for international environmental law. It established the UNFCCC as the primary framework for global climate negotiations. This summit also produced the landmark 'Agenda 21' for sustainable development.
Q: What does the 'Albedo' of a surface represent?
Answer: Its reflectivity of sunlight
Explanation: Albedo is the fraction of solar energy reflected from the Earth back into space. White surfaces like snow and ice have high albedo, while dark surfaces like oceans have low albedo. As ice melts, the Earth's overall albedo decreases, causing more heat absorption.
Q: Which of these is a direct consequence of global warming on weather patterns?
Answer: More frequent and intense heatwaves
Explanation: Global warming disrupts the climate, leading to more extreme weather events. Heatwaves are becoming more common, longer-lasting, and more dangerous. This also affects agriculture and increases the risk of wildfires.
Q: The 'Kyoto Protocol' specifically targeted which group of countries for emission cuts?
Answer: Industrialized countries
Explanation: The Kyoto Protocol, signed in 1997, required developed nations to reduce their greenhouse gas emissions. It was based on the fact that these nations were historically responsible for most emissions. Unlike the Paris Agreement, it did not set targets for developing countries.
Q: What is the name for the 'tipping point' in the climate system that could lead to irreversible change?
Answer: Climate Tipping Point
Explanation: A climate tipping point is a threshold that, when crossed, can lead to a large change in the state of the system. For example, the total collapse of the West Antarctic ice sheet is a potential tipping point. Scientists worry that these changes could happen suddenly and cannot be undone.
Q: Which of the following is the main source of nitrous oxide, a potent greenhouse gas?
Answer: Agricultural fertilizers
Explanation: The use of synthetic and organic fertilizers in agriculture is the largest human source of nitrous oxide. It is nearly 300 times more potent than carbon dioxide at trapping heat. It also plays a role in the depletion of the ozone layer.