Humans and Environment

Q. What are effluents?

1. The solid and liquid wastes released by industries.
2. The solid wastes released by industries.
3. The liquid wastes released by industries.
4. The solid and gaseous wastes released by industries.

Q.

Population explosion has led to

1. environmental pollution

2. deforestation

3. shortage of natural resources

4. all of the above

Q. What are effluents?

1. The solid and liquid wastes released by industries.
2. The solid wastes released by industries.
3. The liquid wastes released by industries.
4. The solid and gaseous wastes released by industries.

Q. Around 10, 000 BC, the total human population was about .

1. 40 lakhs
2. 10, 000
3. 20 crores

Q. Uma says that around 10, 000 BC, the total human population was about 40 lakhs. Hema says that around 10, 000 BC, the total human population was about 1 crore.

Who do you think is right?

1. Uma is right.
2. Hema is right.
3. Both are right.
4. Both are wrong.

Q. Around 10, 000 BC, the total human population was about .

1. 40 lakhs
2. 10, 000
3. 20 crores

Q. Uma says that around 10, 000 BC, the total human population was about 40 lakhs. Hema says that around 10, 000 BC, the total human population was about 1 crore.

Who do you think is right?

1. Uma is right.
2. Hema is right.
3. Both are right.
4. Both are wrong.