Page 130 - year book 22-23(22.08)

Unbelievable Facts
· The heart of a blue whale weighs about 400 pounds, the same weight as an adult
male lion.

· Humans are the only animals who enjoy spicy food.
· There are 12 times more trees on earth than stars in the Milky Way galaxy.
· Our heart beats about 100,000 times in a day.
· Hot water will turn into ice faster than cold water.

· The sentence 'The quick brown fox jumps over the lazy dog' uses every alphabets in
the English language.

· Our nose and ears keep growing throughout our entire lives.

AFFORESTATION

Trees produce oxygen, the main ingredient of life. These days' trees are being cut down for
meeting various needs of man, as a result of which ecological balance is disturbed. Rapid urban
development is one of the major causes of deforestation. To prevent this alarming situation

many private agencies along with the state government and central government have decided to
organise awareness campaigns. They encourage people in planting new trees. They even
distribute seeds of fast growing trees. Eminent personalities from various fields have also

joined hands in this noble cause. Afforestation is necessary to save our mother earth from
perishing.
Advantages of afforestation :
· It grows trees that provide wildlife habitats.
· It helps to resolve the problem of climate change.

· It helps to prevent soil erosion.

Disadvantages of afforestation :

· It comes with real opportunity costs.
· It can affect biodiversity.
· It can bring some problems to ecotourism.