Why is ethical consumption so popular + give data on popularity and the different industries we see ethical consumption in. Why is it a popular trend from social background?

Consumer behavior: Understanding issues around ethical consumption: The attitude behavior gap.

What is ethical consumption? – Definition, explain and analyze thoroughly
What is the attitude behavior gap? – define and explain briefly. (very short and brief)
Why is ethical consumption so popular + give data on popularity and the different industries we see ethical consumption in.
Why is it a popular trend from social background?
Why is it so difficult for consumers to actually act ethically + give data/information on people stating that they act ethically (but actually don’t)?
Why is it so important to advance our knowledge and understanding of this topic?