Answer: supplied air mask
Explanation: because air can go in the mask and the gases and fumes can hurt you.
What defines intelligence? And what kinds of intelligence is there? WATCH BSTTLE OF THE BRAINS ON YOUTUBE IT WILL HELP A LOT.
Diffusions
Osmosis
Facilitated diffusion
Active transport
Solar energy plants take up a lot of land space and can destroy animals habitats. Geothermal is bad because it gives of CO2 which can lead to global warming. Finally, wind power plants (turbines) also take up a lot of space and can destroy animals habitats. They can even be put in the water and destroy marine life.
In the suggest period between 200,000 and 12,000 years ago, humans were living a nomadic lifestyle. The humans of this period were hunter-gatherers, and they were constantly moving from one place to another in accordance to the food supply and climate conditions. Because of this constant movement and constant search for better hunting grounds and places where there's much bigger and more constant supply of fruits, vegetables, root plants, they managed to disperse in very big space and little by little to colonize the planet. In this period the cultivation of plants was still not taking place, and also the humans still hadn't managed to domesticate any wild animals, apart from the wolf which gave rise to the dog, but it was used for hunting, not as a food source.
