Question

lesson 2 review on a sheet of paper, write the answer to each question. use complete sentences. 1. what is global warming? 2. what causes most air pollution? 3. why is soil erosion a problem? 4. what is one example of how people affect the environment? 5. what have countries done to help the environment?

Explanation:

1. Global warming is the long - term heating of Earth's climate system observed since the pre - industrial period due to human activities, primarily fossil fuel burning, which increases heat - trapping greenhouse gas levels in Earth's atmosphere.
2. Most air pollution is caused by the burning of fossil fuels such as coal, oil, and gas in power plants, vehicles, and industrial processes. These emissions release pollutants like sulfur dioxide, nitrogen oxides, and particulate matter.
3. Soil erosion is a problem because it leads to the loss of topsoil, which is rich in nutrients necessary for plant growth. It can reduce agricultural productivity, cause sedimentation in water bodies, and disrupt ecosystems.
4. One example of how people affect the environment is deforestation. Humans cut down forests for agriculture, logging, and urbanization, which reduces biodiversity, increases carbon dioxide levels in the atmosphere, and can lead to soil erosion.
5. Countries have implemented various measures to help the environment, such as setting up protected areas, promoting renewable energy sources like solar and wind power, enacting environmental regulations to limit pollution, and participating in international agreements like the Paris Agreement to combat climate change.

Answer:

1. Global warming is the long - term heating of Earth's climate system mainly due to human - caused greenhouse gas emissions.
2. Burning fossil fuels in power plants, vehicles, and industries causes most air pollution.
3. Soil erosion is a problem as it leads to loss of fertile topsoil, reducing agricultural productivity and disrupting ecosystems.
4. Deforestation is an example of how people affect the environment.
5. Countries have set up protected areas, promoted renewable energy, and enacted environmental regulations to help the environment.