No one motorist can cause a traffic jam. But no traffic jam can exist without individual motorists. We are stuck in traffic because we are the traffic. The ways we live our lives, the actions we take and don't take, can feed the systemic problems, and they can also change them...

The important measurement is not the distance from unattainable perfection, but from unforgivable inaction.

Between 1950 and 1970, the number of American farms declined by half, the number of people employed in farming declined by half, and the size of the average farm doubled. During that time, the size of the average chicken has doubled.

We can choose to make changes, or we can be subject to other changes--mass migration, disease, armed conflict, a greatly diminished quality of life--but there is no future without change. The luxury of choosing which changes we prefer has an expiration date.

Changing how we eat will not be enough, on its own, to save the planet, but we cannot save the planet without changing how we eat.

The four highest-impact things an individual can do to tackle climate change are eat a plant-based diet, avoid air travel, live car-free, and have fewer children. Of those four actions, only plant-based eating immediately addresses methane and nitrous oxide, the most urgently important greenhouse gases.

If we don't demonstrate solidarity through small collective sacrifices, we will not win the war, and if we do not win the war, we will lose the childhood home of every human who has ever lived.

According to the United Nations Framework Convention on Climate Change, if cows were a country, they would rank third in greenhouse gas emissions, after China and the United States.

It is dangerous to pretend that we know more than we do. But it is even more dangerous to pretend that we know less.