Question

What do you understand by sustainable and un-sustainable development?

Answer 1

Sustainable development means ,development should take place without damaging the environment,and development in present should not compromise with the needs of future generation.
And the development which is not "sustainable" is un-sustainanble

Answer 2

Here is ur answer

sustainable development: -
1.. The sustainable development that meets the need of the present without compromising with the future
2..it is all just of the environment

unsustainable development

it occurs when present progress is expense of future generation