Lois removes the krytonite to save Superman. Superman is weak but flies above the clouds to take in energy from the Sun and recharge.

Ever since the light bulb's invention 150 years ago, artificial light has illuminated homes, streets, and skies -- but with some unintended consequences. Learn about the major types of light pollution, their impact on human health, and how the worldwide glow from artificial light may continue to grow.

Hank explains how plastic pollution has had unintended consequences on our planet. He explains how this pollution results in the emission of greenhouse gases, antibiotic resistance and how these pollutants could end up being eaten by people when they eat seafood.

There are many benefits to using renewable energy resources, but what is it exactly? From solar to wind, find out more about alternative energy, the fastest-growing source of energy in the world, and how we can use it to combat climate change.

This clip illustrates human's insatiable exploitation of Earth's resources and its effects on the environment. It also mentions that humans are not factoring in the environment when planning for the growth of civilization and society.