Question

4. Why do we have green house in botanical gardens?​

Answer 1

Answer:

Green houses are the places where plants are grown in optimum temperatures. Plants at early stages of growth and some rare species require only certain amount of heat. So to protect such types of plants green houses are build in botanical gardens.

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Answer 2

Answer:

The main purpose of a greenhouse is securing a reasonable amount of heat and water vapors so that warmth and humidity is maintained within the greenhouse. ... You have control over the temperature of the garden with a greenhouse and you can start planting seasonal plants earlier than others or delay it.