It’s like a sauna today, said Harlan. Yes it is, said Blurtso. I’ll bet it’s unbearably hot in here in the summer, said Harlan. In the summer, said Blurtso, Pablo opens the door and the windows in the roof. Too bad, said Harlan, we can’t do that with the earth. What do you mean? said Blurtso. You know, said Harlan, global warming and the greenhouse effect. What? said Blurtso. The heating of the earth’s atmosphere due to fossil fuels and deforestation. Is that bad? said Blurtso. Disastrous, said Harlan. Why? said Blurtso. Because, said Harlan, it leads to extreme weather, rising sea levels, ocean acidification, and the extinction of species. Which species? said Blurtso. Many species, said Harlan, penguins, seals, turtles, flamingos, salmon, clownfish, koala bears, polar bears. Polar bears? said Blurtso. Yes, said Harlan. I like polar bears, said Blurtso. So do I, said Harlan. We should do something, said Blurtso. Yes, said Harlan, we should.