dense rainforest

Species are going extinct at an accelerated and dangerous rate. The world is facing the greatest rate of extinction since we lost the dinosaurs more than 60 million years ago. Unlike past mass extinctions, our current extinction crisis is almost solely because of environmental changes caused by human activities.

Some of our activities — such as habitat loss, overfishing, the wildlife trade, and the spread of non-native species — directly affect species and ecosystems. Many other human activities have contributed to climate change and pollution, which have indirect but dire effects on diverse species.

With a nod to National Endangered Species Day (the third Friday of May), this quiz tests your knowledge about endangered species, loss of biodiversity, and the current extinction crisis.


Making smart sustainable choices requires practice. Earth911’s weekly sustainability quiz helps you hone your ability to recognize earth-friendly products and services. Through your daily choices — from transportation mode to purchases to waste disposal — you can make a positive difference.

Feature image: Stephanie Edwards from Pixabay

Originally published on April 25, 2019, this quiz was updated in May 2021.

By Earth911

We’re serious about helping our readers, consumers and businesses alike, reduce their waste footprint every day, providing quality information and discovering new ways of being even more sustainable.