The carbon content in a person's diet

The size of a person's ecological footprint

The amount of carbon-dioxide a person adds to the atmosphere

The carbon emissions from a single car

A way to clear land for agriculture

A method of selective logging

A logging practice where most or all trees in an area are cut down

A technique for planting new trees

To put organic waste into a container to break it down into soil

To recycle plastic and metal waste

To bury waste in landfills

To burn waste materials to generate energy

A nation with a declining population

A country that relies solely on agriculture

A poor nation gradually becoming richer and more advanced

A country with a high GDP and advanced technology

Animals or plants in danger of becoming extinct

Animals that are commonly found in zoos

Species that are thriving in their natural habitat

Species that have been recently discovered

Higher air and sea temperatures partly caused by man-made increases in greenhouse-gas levels

A natural cycle of warming and cooling of the Earth

The warming of the Earth's core

The increase in volcanic activity worldwide

To dispose of waste in landfills

To burn waste materials to reduce volume

To make something new from materials that have been used before

To convert waste into energy

Energy that can be used without running out, like solar and wind

Energy derived from fossil fuels

Energy that is stored in batteries

Energy that is generated from nuclear reactions

Releasing no greenhouse gases like carbon-dioxide or methane

Producing minimal waste during manufacturing

Using renewable energy sources

Having a neutral carbon footprint