need help figuring out if I should actually build this!?

Hey everyone, I've been going down a rabbit hole on microplastics for the past few weeks and honestly cant stop thinking about it. The average person consumes something like a credit card's worth of plastic every week through food, water, clothing, and everyday products and most people have no idea of it.

I'm currently an undergrad CS student and I want to actually do something about this beyond just thinking about it. I've been thinking about building a free tool that helps people understand which everyday products expose them to the most microplastics (food packaging, tea bags, synthetic clothing, cosmetics, etc.) and what realistic lower plastic alternatives exist.

Before I build anything I want to make sure it's actually useful and not something that I build just because I see the gap. A few questions for this community:

1. When you learned about microplastics, what was the most useful thing someone could have told you / shown you?

2. Do you use any existing apps or tools to reduce your plastic exposure? If so, what's missing from them?

3. Would a free tool focused on alternatives (not just scary stats) actually change your buying habits?

im not trying to sell anything im genuinely trying to figure out where the biggest gap is before I spend months building the wrong thing. Any honest feedback appreciated, including if you think this already exists and I'm wasting my time!