The risks brought by immigration to the earth

When you go to an alien, you must bring life and plants, or you will eat. We should also bring animals, including animals that provide people with meat, milk and eggs (cows and sheep) and animals that pollinate plants (bees, etc.). ) and the people who accompany us (cats, dogs, etc.). ), otherwise the food is single and the plants are reduced, and we are too lonely there. There are also lactic acid bacteria and yeast to ferment for us.

But, certainly not all creatures! Others are harmful to people, such as flies, mosquitoes, bedbugs and pathogens (plasmodium, HIV, etc. ) that can't be taken.