In a world where profit is consistently put before both people and the planet, climate economics has everything to do with ethics and morality.

My favorite sign here says, "I care about you." In a culture that trains people to avoid each other's gaze, to say, "Let them die," that is a deeply radical statement.

There are lots of incredible people who are working in very flawed structures that are designed to keep us apart, so we're going to have to figure this out. The first stage is just talking about it openly: We are all working within structures where there is a disincentive to do what we most need to do, which is come together. I don't know what the answer is but I definitely think that that first stage is just being honest about it and trying to speak about it in a way that is not just accusatory.

You actually cannot sell the idea of freedom, democracy, diversity, as if it were a brand attribute and not reality -- not at the same time as you're bombing people, you can't.

The fact that Trump's refused to divest from his labyrinth of business holdings, the fact that he's continuing to profit from his brand and indeed create all kinds of new opportunities to profit off the presidency is outrageous. The flip side is that he's left out a lot of levers through which to pressure him. You know, the reason you want a president to divest from his business holdings is that foreign governments can try to exert pressure on him by becoming customers of these hotels and inflating the value of how much they're willing to pay for a Trump brand.

The widespread abuse of prisoners is a virtually foolproof indication that politicians are trying to impose a system--whether political, religious or economic--that is rejected by large numbers of the people they are ruling. Just as ecologists define ecosystems by the presence of certain "indicator species" of plants and birds, torture is an indicator species of a regime that is engaged in a deeply anti-democratic project, even if that regime happens to have come to power through elections.

One of the most disturbing ways that climate change is already playing out is through what ecologists call "mismatch" or "mistiming." This is the process whereby warming causes animals to fall out of step with a critical food source, particularly at breeding times, when a failure to find enough food can lead to rapid population losses.