Fine solid or liquid particles that pollute the air and are added to the atmosphere by natural and man-made processes at the Earth’s surface. Examples

The thin protective layer of gas 10 to 50km above the Earth that acts as a filter for ultraviolet (UV) radiation from the sun. High

Plants and animals that are grown or reared without the use of synthetic fertilisers, pesticides or hormones. — Source: Environmental Protection Agency

Noises that disturb the environment and people’s ability to enjoy it, for example continually sounding house alarms, loud music, air conditioning or other electrical units

Waste produced in urban areas, mainly made up of household waste but also some small commercial waste that is similar to household waste. — Source:

An international agreement signed in Japan in 1997, attached to the UN Framework Convention on Climate Change. Under the agreement, which has been in force

The area occupied by a community or species (group of animals or plants), such as a forest floor, desert or sea shore. — Source: Environmental

The warming of the Earth’s atmosphere caused by increasing levels of gases, such as water vapour and carbon dioxide. These gases absorb radiation emitted naturally

The gradual increase in temperature of the Earth’s surface caused by human activities that cause high levels of carbon dioxide and other gases to be

Fuels – such as coal, gas, peat and oil – that are formed in the ground over a long time from dead plants and animals

Small-scale tourism in fragile and protected areas that aims to have a low impact on the environment, benefit local communities and enable tourists to learn

A community of organisms that depend on each other and the environment they inhabit. — Source: Environmental Protection Agency

The reduction of trees in a wood or forest due to natural forces or human activity such as burning or logging. — Source: Environmental Protection

A rich soil-like material produced from decayed plants and other organic matter, such as food and animal waste, that decomposes (breaks down) naturally. Most food

A change in the climate of a region over time due to natural forces or human activity. In the context of the UN Framework Convention

The breakdown of rocks and minerals by chemical reactions, the dissolving of chemical elements from rocks, or both. — Source: Environmental Science for the AP®

An ethanol derived from cellulose, the cell wall material in plants. — Source: Environmental Science for the AP® Course 3rd Edition (3rd Edition) by Andrew

The process by which cells unlock the energy of chemical compounds. — Source: Environmental Science for the AP® Course 3rd Edition (3rd Edition) by Andrew

The limit of how many individuals in a population the environment can sustain. — Source: Environmental Science for the AP® Course 3rd Edition (3rd Edition)

A chemical that causes cancer. — Source: Environmental Science for the AP® Course 3rd Edition (3rd Edition) by Andrew Friedland, Rick Relyea