Question 7.
What was the significance of placing a mirror in the zoo at Lusaka, Zambia?
Question 8.
What are the earth’s principal biological systems? What is happening to them and what can be the results?
Answers
Answer 7:
In the zoo at Lusaka in Zambia, a mirror has been placed in the cage under which a notice reads, ‘The world’s most dangerous animal’. This notice actually tries to put light on the fact that we humans are the most destructive creatures present on the earth. This has been deliberately done by the zoo authorities to make us realise that we are the real culprits. This step of the zoo authorities up brings some hope.
Answer 8:
The four principal biological systems are fisheries, forests, grasslands and croplands. They are the . foundation of global economy as they supply us with food and raw materials required by the industries. At present, these biological systems are under threat and stress. In the near future, fisheries will deplete, grasslands will turn into wastelands, forests will start disappearing and croplands will also deteriorate. We need to awake and arise before it’s too late. Sense and sensibility is required on the part of all human beings.