Ecosystem
Economy
Science
100

foods that are rich in nutrients and have unique health benefits

Super food

100

careful not to waste money or resources

Economical

100

colourless, odourless gas that occurs abundantly in nature and as a product of certain human activities

Methane

200

a biological community

Ecosystem

200

belonging to or characteristic of an early stage of development

Primitive

200

relating to the science of ecology, which is the study of how living things and their environment interact

Ecological

300

not environmentally harmful

Eco-friendly

300

a person who lives and/or works in a country other than their country of citizenship

Expatriate

300

capable of being maintained or kept going

Sustainable

400

a substance that is applied to soil or plant tissues to provide nutrients for plants

Fertilizer

400

a tropical fruit that is native to South India and Southeast Asia

Jackfruit

400

compounds in foods that scavenge and neutralise free radicals

Antioxidants

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