Hey, Poli, if you seem thick, then when you are bright may get to a super-genius level...
I think 'campaña' is an excellent word. Moliner gives,
campaña 2 *Actividad en que hay lucha o esfuerzo, en favor o en contra de una cosa: ‘La campaña antituberculosa. Una campaña periodística’.
So 'campaña contra el hambre' would definitely be a good option. I personally would tend to understand it and use it as a specific period of activity...
I.e,
the Green Party that follows/supports an environmentalist movement, started a campaign to recycle all plastics...
El partido verde que apoya un movimiento ecologista, empezó una campaña para reciclar todos los plásticos...
We'll see if that is useful for Vivenka...
