Suppose I'm trying to develop prototype for some app that encourages sustainable lifestyle in some way. And say I have a group of participants for conducting user research - asking questions, etc.
From what I know, first I have to establish the need for the solution I'm developing. Do users even want or have need for the app to fulfil any of their goals? One need based on my subjective belief is to contribute positively to environment or sustainability cause.
But what's the best way to get users to affirm or refute that need? My confusion is, if I ask a question like, "Would you like to contribute to a sustainable cause?" or "Do you believe in promoting sustainability?" - I fear that may be a leading question. But I can't think of a way to phrase a question, by answering which I'll understand if that need is present in a user.
What's the best way to approach this?