Trugdaxians look a little bit like Humans (mankind), however, the similarities end there. They have three breasts and two male genitalia. Trugdaxians seem to be marsupials, as Humans are mammals. Trugdaxians are very evolved. They have evolved over trillions of years. They have more experience than any other extraterrestrial in our universe.
They know how to treat someone. They look for the ideal way to treat a lifeform. They want each lifeform to have ideal conditions where it lives.
They are valuable because they are so evolved. The Crag wants Trugdaxians at the helm. They are like directors. They would be an asset to any extraterrestrial.
The ideal conditions for some lifeforms is between 200 and 300 parts per million (ppm) carbon-dioxide (CO2). We need to get more places on earth to these low CO2 levels, so we can make more ideal conditions for all compatible lifeforms on our planet. Trugdaxians are marsupials; they can eat other marsupials. Humans can't eat marsupials, but plants roots can eat them. So, do not get plants' zygotes (seeds) near Trugdaxians. Do not let Trugdaxians eat seeds, or let seeds or roots touch Trugdaxians' bodies.
The last time earth had low CO2 levels was sometime between the last ice age and now. We need to be able to host more lifeforms on our planet. Humans and Trugdaxians cannot be aboard the same space ships, because the gases would have to be replaced after each time we met. Therefore, it is better to meet on a planet.
Trugdaxians are the best at somethings. Humans are better at other things. We can learn from each other. Let's make the best conditions for compatible lifeforms on our planet. Some of them can blend in with the wildlife, like sheep. At any rate, we need to make planets more hospitable, so every lifeform has at least one place to live that is ideal, or close to ideal, for them. So, it is time to end Global Warming and Climate Change, and get back to the 'dawn of man' levels of CO2 in our atmosphere.