Comparison between Perennial and Non-Perennial Rivers:

Difference between Perennial and Non-Perennial Rivers

On unattractive (perennial and non-perennial) crops:

What makes annual plants "annual" and perennial plants "perennial?

Perennial plants are often used in permaculture design.

air exchange machines, for severe perennial allergies

What type of flowers – bulbs, annuals or perennials?

And perhaps most especially, they weren’t permanent.

Assignment of unique and permanent identifiers (PIDs)

First, is the disregard for enduring political structures.

How do we build sustainable and effective collaborations?

How can effective partnerships be created and sustained?

Sustainability Transition Needs Sustainable Finance.

The rational and sustainable exploitation of sustainable species

Constant conflicts and, as a consequence, family breakdown.