I love what one of the presidents before you, Mr. Abraham Lincoln, said: “United we stand, divided we fall.”

Mr. B. explained that this statement is now true for our whole world. He is always teaching us about saving the planet. We are all connected, he says, like an intricate spiderweb. If we dirty the air here in the United States, it will eventually blow over to Canada and maybe kill a bunch of people there. If some factory poisons a river in Mexico, it will flow into Texas and people will die there.

I even thought of my own example! Those swallows that Tyler says fly to Mexico for the fall and winter. Just a week ago, they all left. Suddenly, the backyard was so quiet. I miss them so, and I worry that something might happen to them on the way to Mexico.