Hi, John here with a cold open to this episode.

Before the proper podcast starts, I want to let you know that the Anthropocene Reviewed

is going on tour, albeit very briefly.

On August 16th, I will be in Madison, Wisconsin, and on August 18th in Minneapolis, Minnesota,

there will be live Anthropocene Reviewed as well as live deer hank and john, the podcast

I co-host with my brother.

You can find out more and get tickets at hankandjohn.com.

All the proceeds will go toward our project to reduce child and maternal mortality in

Sierra Leone.

I really hope to see you in Madison and or Minneapolis.

Thank you.

Alright, here's the show.

Hello and welcome to the Anthropocene Reviewed, a podcast where we review different facets

of the human-centered planet on a five-star scale.

I'm John Green, and today I'll be reviewing air conditioning and a family of tree species

known as sycamore trees.

Let's begin with air conditioning.

Over the last hundred years, the weather for humans has gotten considerably hotter, and

not only because of global warming, but also because of where we are choosing to live.

Here in the United States, for instance, the three fastest growing states over the last

century, Nevada, Florida, and Arizona are also among the warmest states.

This trend is perhaps best exemplified by the US's fifth largest city, Phoenix, Arizona,

...