"Negativity is totally unnatural. It is a psychic pollutant, ..." — Eckhart Tolle quote meaning

Negativity is totally unnatural. It is a psychic pollutant, and there is a deep link between the poisoning and destruction of nature and the vast negativity that has accumulated in the collective human psyche. No other life-form on the planet knows negativity, only humans, just as no other life-form violates and poisons the Earth that sustains it. Have you ever seen an unhappy flower or a stressed oak tree? Have you some across a depressed dolphin, a frog that has a problem with self-esteem, a cat that cannot relax, or a bird that carries hatred and resentment? The only animals that may occasionally experience something akin to negativity or show signs of neurotic behavior are those that live in close contact with humans and so link into the humans mind and its insanity.