VOA慢速英语:India Celebrates 50th Anniversary for Rice That Prevented Famines

variety - n. a particular kind of person or thing

pesticide - n. a chemical that is used to kill animals or insects that damage plants or crops

transform - v. to change something completely - and usually in a good way

depletion - n. to use most or all of something important; to greatly reduce the amount of something

irrigate - v. to supply something (such as land) with water by using artificial means (such as pipes)

tractor - n. a large vehicle used to pull farm equipment

biodiversity - n. the existence of many different kinds of plants and animals in an environment

malnourishment - n. lack of proper nutrition

climate change - n. a change in global climate patterns caused by an increase in carbon dioxide resulting from the use of fossil fuels (coal and natural gas)