Q.Why do we have green house in botanical gardens?

Step 1. Recall what a botanical garden aims to do. A botanical garden grows living plants of many varieties collected from different parts of the world — this necessarily includes species native to climates quite different from the garden's own location.

Step 2. Identify the problem this creates. A plant native to, say, a tropical rainforest or a cold alpine region cannot simply be planted outdoors in a garden with a very different natural climate — it would not survive. …

Explaining the purpose of controlled-environment structures within the ex-situ con …

• Giving a generic answer like 'to protect plants from weather' without specifying that it is about growing species from a different climate than the garden's own. …