Clarification
Ok, I'm gonna be the douche-bag that bags on your animation. It was a good animation, but like others it was just a fluff piece that didnt' really address any issue, what's causing it or how to fix it. You've got nuclear silos spilling out ... toxic fumes ... and polluting the water. Nuclear energy is actually one of the cleanest sources of energy we have. The stuff billowing out of the silos is steam. The leftover rods are easily contained. We've been hard on it lately, though, b/c even it is prone to natural disasters and careless oversight.
I'll spell out the real danger in why polluting our planet is bad. First, humans are egotisical, and think the world revolves around them. But, in reality, we are merely products of our environment. The Earth has been here for millions of years, and we evolved to survive in the environment it provided. However, our ability to alter the environment at drastic speeds is far greater than our ability to adapt/acclimate to a new environment.
If we keep altering the Earth's environment, it will be ok. The Earth is an environment, and it can withstand alteration; it has through-out the course of time, from when it was nothing but bubbling lava beds to a sea-covered world to an ice age to now. However, the various species that live on the world at certain times ... can't change fast enough. WE can't change fast enough. The world will be ok if its environment changes, but WE won't. As time has passed, the Earth's environment has altered so drastically NATURALLY that many species became NATURALLY extinct. Today, we're altering our environment so drastically UNNATURALLY that we have the potential to UNNATURALLY make ourselves extinct. And the a-hole thing about it is we'll make tons of other species extinct as collateral damage for our carelessness.
So, overall, the Earth doesn't care if we pollute or not. Eventually, we will make an environment that no longer supports us, and as evolution takes place, other species will adapt to be able to fit into that environment better than us...and we will become extinct as a new caretaker of the world rises up in our place as the dominant species.... and we will be but a footnote in the Earth's history.