store more energy than other gases

are the most common substances in our atmosphere

come into our atmosphere from space

are leaking from Earth's crust

the presence of harmful or poisonous substances in our environment

the gradual increase in the air temperature at the surface of the Earth

long term changes to weather patterns

heat being trapped in by atmospheric gases

the presence of harmful or poisonous substances in our environment

the gradual increase in the air temperature at the surface of the Earth

long term changes to weather patterns

heat being trapped in by atmospheric gases

the presence of harmful or poisonous substances in our environment

the gradual increase in the air temperature at the surface of the Earth

long term changes to weather patterns

heat being trapped in by atmospheric gases

Carbon sinks

Combustion

Respiration

Photosynthesis

A drop in carbon levels due to renewable energy

A fossil fuel that releases carbon when burned

Something that absorbs and stores carbon

Burying carbon below ground or sea

Cut down more trees

Plant more trees

Breathe less

Breathe more

Reduce animal farming

Use renewable energy

Use gas instead of coal

Exercise more

That carbon dioxide has been naturally rising

That human behaviour has caused an increase in greenhouse gases

That renewable energy is helping reduce carbon levels

An indirect correlation between values

the collection and processing of materials

the reuse of products instead of throwing away

the reduction of waste by using and buying less

manufacturing using raw materials

the removal of minerals from an ore

the removal of ore from a mineral

the separation of metal from its compound

recycling of aluminium cans

the carbon cycle

the position in the reactivity series

availability or abundance

quality of ore

aluminium that is extracted by heating with carbon

aluminium that is extracted using electrolysis

iron oxide that is extracted by heating with carbon

iron that is extracted with electrolysis