Air Pollution There is obviously a very serious problem of pollution in our cities nowadays. In this short article we shall discuss two problems: the cause of air pollution and possible ways of reducing or controlling it. The first question then is: What cause air pollution? in a typical cit...
[习作参考] It is now generally accepted that vehicles (cars, trucks, etc. ) are a major source of air pollution in cities. Some solutions to the problem have been proposed, such as reducing the number of vehicles and using lead-free petrol. However, I would suggest replacing petrol with ...
NCERT solutions for CBSE and other state boards is a key requirement for students. Doubtnut helps with homework, doubts and solutions to all the questions. It has helped students get under AIR 100 in NEET & IIT JEE. Get PDF and video solutions of IIT-JEE Mains & Advanced previous year pap...
View Solution Sum ofσandπbonds present in tetra cyano ethylene is K_3[Fe(CN)_6] It is said: - (a) Potassium haxasano (II) (b) Potassium hexa cyano (III) (c) Potassium (d) Hexa cyano (III) Potassium View Solution
How long did it take Alice to write the composition A.More than an hour. B.Two hours. C.Less than an hour. 免费查看参考答案及解析 题目: Write a composition of at least 60 words about how to save water in our homes with the reference questions.1. Why must we save water2. What ...
The reasons for this are various. Firstly, the increase in population has led to more waste being produced. Secondly, the development of industry has caused serious air and water pollution. Thirdly, the widespread use of automobiles has led to air pollution and noise pollution. Environmental ...
Polluted air can cause illness and even death. Polluted water kills fish and other marine life. Pollution of soil reduces the amount of land on which we can grow food. Environmental pollution also brings ugliness to man’s naturally beautiful world.It is important that effective action should ...
NCERT solutions for CBSE and other state boards is a key requirement for students. Doubtnut helps with homework, doubts and solutions to all the questions. It has helped students get under AIR 100 in NEET & IIT JEE. Get PDF and video solutions of IIT-JEE Mains & Advanced previous year pap...
Doubtnut helps with homework, doubts and solutions to all the questions. It has helped students get under AIR 100 in NEET & IIT JEE. Get PDF and video solutions of IIT-JEE Mains & Advanced previous year papers, NEET previous year papers, NCERT books for classes 6 to 12, CBSE, Path...
I dream when I grow up I will be a doctor who is called “a While Angel”. In my impression, an Angel is kind and beautiful. So I’ll take care of patients more carefully and help all the people who feel miserable just like an Angel. ...