Question

Contaminant is (a) a pollutant (b) a component originally not present in cnvironment but released into environment by human activity (c) pollutant relcased into the environment in natural calamitics (d) pollutant released from industrics

Short answer

Option (b): a component originally not present in environment but released into environment by human activity.

Step-by-step solution

- Understand the Question

The problem is to identify the correct definition or category for the term 'contaminant' from the given options.

- Analyze Each Option

Examine the detail provided for each option:(a) a pollutant - A harmful substance introduced into the environment.(b) a component originally not present in environment but released into environment by human activity - This implies a foreign substance introduced by human actions.(c) pollutant released into the environment in natural calamities - Substances released by events like volcanic eruptions or floods.(d) pollutant released from industries.

- Choose the Most Accurate Option

Among all the options, the one that most clearly defines a 'contaminant' is (b) since it specifically refers to a foreign substance introduced by human activity, aligning closely with the definition of a contaminant.

- Verify the Choice

Cross-check the meaning of 'contaminant' which is typically a substance that should not be present in the environment, introduced mainly by human activities. This aligns with option (b).

Key concepts

Contaminants

Contaminants are substances that should not be present in the environment. These can include chemicals, biological materials, or even energy forms like radiation. Contaminants are generally harmful and can disrupt the natural balance of ecosystems. They may affect both the air, water, soil, and living organisms. Understanding what contaminants are is essential for identifying and mitigating their impacts on the environment. When contaminants enter the environment, they can cause pollution and pose health risks to humans and animals.

Human Activity

Human activity is one of the primary sources of contaminants. Activities such as industrial processes, agriculture, urban development, and transportation release various harmful substances into the environment. For example:

• Industrial processes may release chemicals and heavy metals.
• Agriculture often involves the use of pesticides and fertilizers.
• Urban development can lead to the release of construction debris and pollutants from vehicles.

These activities introduce foreign substances that can be hazardous to natural ecosystems and human health. Understanding the role of human activity in environmental contamination can help in developing strategies to reduce pollution and promote sustainability.

Pollutants

Pollutants are harmful substances that contaminate the environment. They can be derived from both natural sources and human activities. Natural sources include events like volcanic eruptions and wildfires, which release ash and gases into the atmosphere. Human activities, however, are often responsible for the majority of pollutants. Examples include:

• Chemicals from industrial waste.
• Emissions from vehicles.
• Plastics and other waste materials.

Pollutants can cause a wide range of problems, including air and water pollution, soil degradation, and health issues for living organisms. Managing and reducing pollutants is crucial for maintaining a healthy environment and protecting public health.