Unleaded (petrol) /ʌnˈledɪd/

Gas /ɡæs/

Carbon /ˈkɑːbən/

Definition: A chemical element found in all living things and in fuels

Example: Reducing carbon emissions is essential to fight climate change.

Exhaust /ɪɡˈzɔːst/

Conserve /kənˈsɜːv/

Definition: To protect and not waste resources

Example: We need to conserve water during the drought.

Electricity /ɪˌlekˈtrɪsəti/

Biofuel /ˈbaɪəʊˌfjʊəl/

Dwindle /ˈdwɪndl/

Definition: To gradually become smaller or less

Example: Natural gas supplies are beginning to dwindle.

Convert /kənˈvɜːt/

Fumes /fjuːmz/

Definition: Strong-smelling gases or smoke, often harmful

Example: The factory released toxic fumes into the air.

Emit /ɪˈmɪt/

Balance /ˈbæləns/

Disposable /dɪˈspəʊzəbl/

Definition: Intended to be used once or for a short time and then thrown away

Example: Disposable plastic products contribute to pollution.

Counter /ˈkaʊntə/

Efficient /ɪˈfɪʃənt/

Definition: Working well without wasting time or resources

Example: Energy-efficient appliances help reduce electricity bills.

Critical /ˈkrɪtɪkəl/

Definition: Extremely important or serious

Example: It's critical to reduce emissions to combat climate change.

Discharge /dɪsˈtʃɑːdʒ/

Solar /ˈsəʊlə/

Fuel /ˈfjʊəl/

Definition: A substance that produces energy when burned

Example: Wood was used as fuel for cooking and heating.