Question

how can we ensure that dams do not threaten the environment

Answer 1

Because before letting the water out of the dam they check the climatic conditions and let it flow out so it is nat a threat

Answer 2

Dams are very helpful for us in many cases such as generating hydroelectricity, in irrigation purposes etc.

But there are way too many drawbacks too.

So to ensure that dams do not threat environment then you can take following steps: Replace old and outdated dams by building new ones.

Make sure that the dams must be built on the sites where there is least environmental and social damage.

Use the existing dams to produce hydroelectricity more efficiently.