Question

write ashort note on valves types of application of valves example gate valve ,ball valve,plug valve, butterfly valve and diapragm valve

Answer 1

Major pollution such as water, air and noise pollution can be controlled through forests.

6.1 Air Pollution. According to who, air pollution may be defined as:

6.3 Plants as air cleaner. Plants Perform an important role in reducing air pollution and thus they act as cleaner.

6.4 Water Pollution.

6.3 Noise Pollution.