Question

57. How is water purified ? Give the diffrent methods.


58. What are the harmful effects of ozone depletion?​

Answer 1

Answer:

The methods used include physical processes such as filtration, sedimentation, and distillation; biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination; and the use of electromagnetic radiation such as ultraviolet light.

Explanation:

Ozone layer depletion causes increased UV radiation levels at the Earth's surface, which is damaging to human health. Negative effects include increases in certain types of skin cancers, eye cataracts and immune deficiency disorders.

Answer 2

Answer:

ʜᴇʀᴇ ɪs ʏᴏᴜʀ ᴀɴsᴡᴇʀ ⬇️

Explanation:

57 ) In certain areas of the world that do not have access to water treatment plants, alternative methods of purification must be used. Those methods include boiling, granular activated-carbon filtering, distillation, reverse osmosis, and direct contact membrane distillation.

58) Ozone layer depletion causes increased UV radiation levels at the Earth's surface, which is damaging to human health. Negative effects include increases in certain types of skin cancers, eye cataracts and immune deficiency disorders.