Here’s a myth on preserving guacamoles

DEAR HELOISE: To keep guacamole from turning brown after making it, place the pit into the mixture, and it will stay nice and green.

— Carolyn Y., in Abilene, Texas

Carolyn, I’m sorry to say that this is only a myth. The avocado seed does not prevent guacamole from oxidizing to a brown color, except for the small area directly under the seed. Instead, use a cling film and place it on top of the guacamole.

DEAR HELOISE: I wanted to write in about your response to Janice G. in a letter titled: “To travel or not to travel?” Something more important than people’s travel preferences is the habitability of the planet. Tourism is responsible for roughly 8% of the world’s carbon emissions. Plane flights, boat rides, souvenirs and lodging — they all contribute to tourism’s carbon footprint.

Gre