Which of the following statement is correct? I. CO 2is not a greenhouse gas. II. Clean and drinkable water is called drinking water.
Analyzing Statements about Greenhouse Gases and Drinking Water
Let's carefully examine each statement to determine its correctness regarding greenhouse gases and drinking water.
Analyzing Statement I: CO2 is not a greenhouse gas.
Statement I claims that Carbon Dioxide (CO2) is not a greenhouse gas. To evaluate this, we need to understand what greenhouse gases are.
- Greenhouse gases are atmospheric gases that absorb and emit radiant energy within the thermal infrared range.
- This process is the fundamental cause of the greenhouse effect.
- Common greenhouse gases include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and water vapor (H2O).
- Carbon dioxide is a major greenhouse gas produced by both natural processes and human activities, such as the burning of fossil fuels.
- Because CO2 absorbs infrared radiation, it traps heat in the Earth's atmosphere, contributing to global warming.
Therefore, statement I, which claims CO2 is not a greenhouse gas, is incorrect.
Analyzing Statement II: Clean and drinkable water is called drinking water.
Statement II describes drinking water. Let's consider the definition of drinking water.
- Drinking water, also known as potable water, is water that is safe to drink or use for food preparation.
- It must be clean and free from harmful levels of contaminants, pathogens, and other substances that could cause illness.
- Water that is clean and drinkable is, by definition, suitable for consumption.
Therefore, statement II, which states that clean and drinkable water is called drinking water, is correct.
Conclusion based on Statement Analysis
Based on the analysis:
- Statement I: CO2 is not a greenhouse gas. (False)
- Statement II: Clean and drinkable water is called drinking water. (True)
We are looking for the correct statement(s). Only Statement II is correct.
| Statement | Claim | Analysis | Correctness |
|---|---|---|---|
| I | CO2 is not a greenhouse gas. | CO2 absorbs infrared radiation, contributing to the greenhouse effect. | Incorrect |
| II | Clean and drinkable water is called drinking water. | Drinking water (potable water) is water that is safe and clean for consumption. | Correct |
Revision Table: Key Concepts
| Term | Definition/Explanation | Relevance to Question |
|---|---|---|
| Greenhouse Gas | Gases that trap heat in the atmosphere by absorbing infrared radiation. | CO2 is a primary example, making Statement I incorrect. |
| CO2 (Carbon Dioxide) | A chemical compound often produced by combustion; a significant greenhouse gas. | Central to evaluating Statement I. |
| Drinking Water (Potable Water) | Water that is safe for human consumption. | The definition that validates Statement II. |
Additional Information on Greenhouse Gases and Drinking Water
Understanding greenhouse gases and the properties of water is important for environmental science and public health.
More on Greenhouse Gases and the Greenhouse Effect
The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches Earth's atmosphere, some is reflected back to space, some is absorbed by the atmosphere, and some is absorbed by the Earth's surface. The Earth's surface warms up and radiates energy back out as infrared radiation. Greenhouse gases absorb this infrared radiation, trapping heat and keeping the planet warm enough to support life. An increase in the concentration of greenhouse gases, particularly due to human activities, is linked to global warming and climate change.
More on Drinking Water Quality
Ensuring water is clean and drinkable involves testing for various parameters, including:
- Microbiological contaminants (like bacteria and viruses)
- Chemical contaminants (like lead, pesticides, nitrates)
- Physical characteristics (like turbidity, color, odor)
Various organizations, such as the World Health Organization (WHO) and national environmental agencies, set standards for drinking water quality to protect public health. Water that meets these standards is considered potable or drinking water.
Therefore, the description in Statement II accurately reflects the nature of drinking water.
Important Questions from Environment
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I. Converting kitchen waste into compost through worms or red earthworms is called vermicomposting.
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Which of the following conferences works for the prevention of desertification?
