What purposes does a person use plants for?

Plants are essential in human life:
a) it is the main source of nutrients and vitamins – bread, vegetables, fruits, cereals, vegetable oils, etc .;
b) it is a source of wood for furniture, housing, paper production;
c) these are raw materials for the chemical industry – the production of varnishes, paints. solvents;
d) are used for the treatment of diseases in both folk and professional medicine;
e) have a decorative value, decorating our life and purifying the air.