1. What are the ecological disasters and what are their hazards? 2. Can we migrate to other planets? Why?

1. ozone layer destruction, greenhouse effect, land desertification (including desertification, red desert, rocky desertification, Gobi, secondary salinization, etc.), three wastes pollution and waste transfer, forest coverage reduction, biodiversity reduction, water resources depletion, etc.

2. Not at present. Just for now, because enough oxygen and water are needed for human life, it has not been found on other planets so far. In distant galaxies, there may be planets with the same superior conditions as the earth, but the current technical level of human beings is still unable to build a fast enough aircraft to transport human beings.