Environmental themes in Pixar films

I just watched another amazing technical achievement from Pixar films.

The year is 2700. WALL•E, a robot, spends every day doing what he was made for. But soon, he will discover what he was meant for. From Academy Award®-winning director, Andrew Stanton (FINDING NEMO), WALL•E is the story of one robot's comic adventures as he chases his dream across the galaxy.

This latest Pixar film illustrates a convincing environmental theme where excessive waste, over-consumption, and an unsustainable lifestyle inevitably leads to the destruction of the Earth's natural ecosystem which then prompts the human race to temporarily leave the planet. Living in an "adult-Disney-fied" space station, the remaining humans become saddly obese and ultimately have to wait almost 700 years to return to Earth by the end of the movie.

I've noticed that the last string of Pixar feature films have embeded some sort of enviroment-related theme in their story plots or settings. Cars (suburban sprawl and freeway expansions impacting small communities; Finding Nemo (over fishing, pollution of oceans), and perhaps stretching it a little. Rataouille (fresh organic food).

Will this be a trend? I'm looking forward to the next Pixar film.