Choose the correct answer by crossing A, B, C, D, or E!

This text is for questions 1 to 4.
 

    Food waste is a very serious issue in the world. Most people don't realize how often they waste food and the negative impacts it can have for food security, the environment, and climate change. Therefore, in my opinion, food waste is bad for some reasons.

    First, food waste can cause climate change. When thrown into landfill, food waste produces a large amount of methane. As food rots and degrades, it emits these harmful gases. These gases are more harmful than carbon dioxide in terms of trapping heat in the atmosphere.

    Second, food waste represents a great waste of freshwater·and ground water resources. We use a lot of water when producing food. If we throw away food, we were wasting water.

    Lastly, food waste has an effect on society. While we were throwing food out, many people around the world have limited access to food. Wasting food raises social questions, particularly given the current global financial crisis, rising food prices and international food shortages.

    From those reasons, it can be concluded that wasting food has negative impacts on climate, water, and society.

What is the issue discussed in the text?