Space Cactus Canyon

The year is 2543.  You are the last cactus on Earth. You live in the scorching deserts of the Rocky Mountains in what used to be Alberta, Canada.  The heat is nearly unbearable and wildfires are common.  The rest of your fellow cacti have moved to a more temperate climate ... on Mars.  They have sent a final spaceship to transport you there. Reaching it won’t be easy.  Water has become E…