Activism is the practice of strong, vigorous support (through action) in support of or against a controversial issue. Environmental activism efforts include battling climate change and greenhouse gas emissions, defending the oceans, protecting forests, creating a toxic-free future, campaigning for sustainable agriculture, protesting animal testing, promoting vegetarianism/veganism, protecting endangered species and many more. (Source: Merriam-Webster Dictionary, Greenpeace / Photo: Flickr)

Dutch inventor launches ocean cleanup mission

Why Brits are tossing empty potato chip bags in the mail, not the trash

The world's most famous pig isn't legally allowed to be treated for cancer

A dog who spent her life on a chain checks off a bucket list she never knew she had

How a dog found in a garbage pile in Egypt found his calling in America

This is what happened to the puppy who was almost killed for being the 'wrong' kind of dog

This cat — and many others like her — spent most of her life as a lab test subject

Man cuts lawns for the needy in all 50 states

A Georgia couple met a dog breed they had never seen — and became their champions

The way animals are treated in Liberia is changing, and children are leading the way

Tigger got dropped off at the shelter at 16

How a shelter pup beat a deadly virus and found his way to a rock star's heart