English

A) What is Clean Technology ? B) Why is It Essential to Ban Plastic Bags? - Science and Technology 2

Advertisements
Advertisements

Question

a) What is clean technology ?
b) Why is it essential to ban plastic bags?

Solution

a) The clean technology is the control over air pollution, soil pollution and water pollution with the help of microbes.
b) There is extensive use of plastic bags.
i) Even after many years, plastic is not decomposed and the contents in it do not dissolve leads to soil pollution.
ii) Plastic bags thrown in drains obstruct the flow of streams, stagnant sewage water is a cause of many diseases.
iii) The plastic bags are eaten by the cattle can lead to stomach cancer.
iv) The poisonous gas mixes in the environment by burning plastic bags. Due to many such hazardous consequences, plastic bags should be banned.

shaalaa.com
  Is there an error in this question or solution?
2018-2019 (March) Balbharati Model Question Paper Set 3

RELATED QUESTIONS

The bread or idli dough rises because of ______.


Answer the following.
How can the oil spills of rivers and oceans be cleaned?


Which are the reasons for increasing the popularity of probiotic products?


Give scientific reason.

Enzymes obtained by microbial process are mixed with detergents.


Salts which can be used as supplement of calcium and iron are obtained from ______ acid.


Explain the uses of micro-organisms.


Gaseous fuel : Coal gas : : ___________ : Coal


Microbes have the natural ability of decomposing the man-made chemicals.


Which microbes convert uranium to its insoluble salts?


Give scientific reason.

Probiotics have got more importance in recent times.


Give scientific reason.

A biofuel is an important tool in renewable energy sources.


Give scientific reason.

Microorganisms are used to control the effects of sea oil spills.


How is soil pollution controlled by microbes?


Why should we use bioinsecticides?


Complete the paragraph by selecting the appropriate option in parentheses.

(energy, microbial, erosion-proof, reused, purification, environmentally friendly)

Nowadays, instead of chemical catalysts, _______ enzymes are used in the chemical industry. These enzymes are active at low temperature, pH and pressure; due to which _______ is saved and _______ instruments are also not necessary. Enzymes carry out specific processes; hence unnecessary by-products are not formed due to which expenses on _______ are minimised. In case of microbial enzymatic reactions elimination and decomposition of waste material is avoided and enzymes can be _______ Hence, such enzymes are _______.


Diptheria affects the ______.


______ is a biocontrol agent.


Why does yeast help in fermentation?


Give a scientific reason.

Why it is necessary to ban the use of plastic bags?


Complete the following conceptual picture.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×