How science helped in solving the food problem in several countries?

Science has helped in solving food problems in the following ways:
(i) It has introduced new agricultural implement.
(ii) Science has improved the quality of seeds by genetic
(iii) High yielding hybrid variety of grains have been
developed. Some easily reaping varities have also been developed and grown.
(iv) Use of pesticides and insecticides have saved crop from being destroyed by the insects and pests.
(v) Some new types of crops are also developed and
are being developed to meet the requirement of the society.