The tree is the most useful, single plant to humans. Not only does it provide a lot of oxygen, but forests are the homes for most of the animals on the planet. Forests are homes to natives of many countries. Natives of America lived among the forests before a different cultured society came along and removed them to make way for towns. Trees are used for our paper, to build buildings, our homes, furniture, and tools.
Oxygen is the most useful gas to human beings as it is essential for respiration. Carbon monoxide is considered the most dangerous gas to humans as it can displace oxygen in the bloodstream, leading to carbon monoxide poisoning, which can be fatal.
The sun's energy is most useful to humans after it is converted to electricity or heat energy, which can power homes, businesses, and technology.
Nitrogen is considered to be the most limiting nutrient in a plant's growth and development.
whole plant is usefull. ali most all the parts of the plant are usefull.
Aluminium is one of the most useful metals. Aluminium is not toxic.
Yes, it could be considered the most dangerous carnivorous plant.
Most humans are considered omnivores, but again there are vegetarians and vegans
Yes, it is the part of the spectrum our eyes are the most sensitive to.
you would use miles.
chemistry
We get linen from the flax plant. Linen is a textile that is made from the fiber of the plant. Most likely to be described as woven fabrics. Hope that it would be useful :)
Humans.