Sustainable vs Organic

What is the nexus between sustainability and organic farming? Is sustanable = organic?

To answer this, follow this format:

Part 1

Explain the Sustainable agriculture: how does it work, what does it do?

Part 2

What is the problem that the Sustainable agriculture addresses?

Part 3

What is the current stated of business and/or consumer adoption of the Sustainable agriculture?

Part 4

What are some of the challenges and barriers to adoption of the Sustainable agriculture, and how might those challenge be addressed?

Part 5

What are the social benefit and risks associated with the Sustainable agriculture?