Question 1: Define 'carbon footprint' and explain its significance in relation to the greenhouse effect.

Answer: A carbon footprint is the total amount of carbon dioxide and other greenhouse gases emitted directly or indirectly by an individual, organization, or activity. It is significant because it contributes to the greenhouse effect, leading to global warming and climate change.

Question 2: Describe how human activities such as transportation and energy production influence the greenhouse effect.

Answer: Activities like transportation and energy production release large amounts of greenhouse gases, especially CO2, into the atmosphere. These gases trap heat, enhancing the greenhouse effect and contributing to global warming.

Question 3: Fill in the blank: The primary greenhouse gas associated with human activities is __________.

Answer: carbon dioxide

Question 1: Calculate the total CO2 emissions (in kg) from burning 50 liters of gasoline, knowing that burning 1 liter of gasoline releases approximately 2.3 kg of CO2. Show your calculation.

Answer: Total emissions = Volume of gasoline (liters) × CO2 per liter = 50 liters × 2.3 kg/liter = 115 kg of CO2.

Question 2: A household uses electricity generated mainly from coal, which produces about 0.9 kg of CO2 per kWh. If the household consumes 300 kWh in a month, what is its estimated carbon footprint for electricity? Show your work.

Answer: Carbon footprint = 300 kWh × 0.9 kg/kWh = 270 kg of CO2.

Question 1: Identify three major variables that influence the size of an individual's carbon footprint.

Answer: Type of transportation used, energy consumption habits, diet and food choices, and lifestyle activities.

Question 2: Propose two practical methods that individuals can adopt to reduce their carbon footprint.

Answer: Using public transportation or cycling instead of personal vehicles, and reducing energy consumption by turning off unused appliances.

Question 3: Explain why switching to renewable energy sources helps decrease the carbon footprint.

Answer: Renewable energy sources like solar or wind produce little to no greenhouse gases during energy generation, thereby reducing overall carbon emissions.

Question 1: A factory emits 1500 kg of CO2 daily. If the factory implements energy-saving measures reducing emissions by 20%, what will be its new daily emission level? Show your calculation.

Answer: New emissions = 1500 kg × (1 - 0.20) = 1500 kg × 0.80 = 1200 kg of CO2.

Question 2: Interpret the impact of reducing daily emissions from 1500 kg to 1200 kg on the environment and the factory's carbon footprint.

Answer: Reducing daily emissions by 300 kg decreases the factory's overall carbon footprint, leading to less greenhouse gas accumulation in the atmosphere, which can help mitigate the greenhouse effect and slow global warming. It also demonstrates the effectiveness of energy-saving measures in industrial processes.

Question 1: Describe how the transportation industry can reduce its carbon footprint and why it is important for combating climate change.

Answer: The transportation industry can reduce its carbon footprint by adopting electric vehicles, improving fuel efficiency, and promoting public transportation and cycling. These measures decrease greenhouse gas emissions, which are crucial for reducing the greenhouse effect, slowing global warming, and protecting the environment for future generations.