Just to illustrate how serious the ecological crisis we are in, actually is, let me paraphrase something I wrote, which you can find near the beginning of the bullet list, on the Solutions page:
It is imperative that our worldview shift from one that is highly anthropocentric, to one that is highly ecocentric. Two simple facts bear this out: Dinosaurs lasted on this planet for over 150,000,000 years (and might still be around today, if it weren’t for an asteroid colliding with the Earth). Modern man is on course towards wiping out all (or virtually all) species on the planet, within the next 1,000 years.
In this respect, modern man can be likened to an approaching asteroid.