Freeganism is a lifestyle where people try to reduce waste and their impact on the environment by not buying things or eating food that have been wasted or thrown away.
Imagine if you go to a birthday party and the cake leftovers are about to be thrown away. Instead of buying a new cake from the store, freegans would take the leftovers home and eat them. They would try to use what they already have or find ways to reduce the amount of waste they produce.
Freegans also try to live sustainably, which means they try to use energy and resources in a way that doesn't harm the planet. They might ride bikes or use public transportation instead of driving a car, or they might try to live in a way that doesn't use a lot of electricity or water.
Overall, freeganism is about being aware of the resources that we use and making conscious choices to reduce waste and give new life to items that would otherwise go to waste.