✅ B. Breakdown of larger plastic items and synthetic fibres
a: Only untreated timber | b: Breakdown of larger plastic items and synthetic fibres | c: Only volcanic ash | d: Only fresh snow Read more
✅ A. Troposphere
a: Troposphere | b: Thermosphere | c: Mesosphere | d: Exosphere Read more
✅ A. Meeting present needs without undermining future generations' ability to meet theirs
a: Meeting present needs without undermining future generations' ability to meet theirs | b: Ignoring environmental impacts | c: Using every resource as quickly as possible | d: Banning all technology Read more
✅ D. Organisms interacting with each other and their physical environment
a: A mineral deposit | b: A weather instrument | c: Only a single animal | d: Organisms interacting with each other and their physical environment Read more
✅ A. Carbon dioxide
a: Carbon dioxide | b: Argon | c: Neon | d: Helium Read more
✅ B. Processes materials so they can be used again
a: Creates new raw materials from nothing | b: Processes materials so they can be used again | c: Prevents all waste automatically | d: Always turns waste into fuel Read more
✅ D. An area of land draining to a common outlet
a: A water bottle | b: A sea current | c: A weather satellite | d: An area of land draining to a common outlet Read more
✅ D. Controlled decomposition of organic material
a: Mining coal | b: Burning plastic | c: Distilling seawater only | d: Controlled decomposition of organic material Read more
✅ B. Land degradation in dry areas
a: A desert becoming a city overnight | b: Land degradation in dry areas | c: Ocean tides | d: A type of rainfall Read more
✅ D. Paris Agreement
a: Ramsar Convention | b: Montreal Protocol only | c: Basel Convention | d: Paris Agreement Read more
✅ B. The clearing or removal of forests
a: Cleaning a river | b: The clearing or removal of forests | c: Recycling glass | d: Planting a forest Read more
✅ C. A species facing a high risk of extinction
a: A nonliving resource | b: A species found everywhere | c: A species facing a high risk of extinction | d: A species with no habitat needs Read more
✅ D. Energy from sources replenished naturally on human timescales
a: Energy only from oil | b: Energy only from coal | c: Energy from burning peat only | d: Energy from sources replenished naturally on human timescales Read more
✅ C. Carbon dioxide
a: Neon | b: Argon | c: Carbon dioxide | d: Helium Read more
✅ B. Using efficient appliances and switching off unused devices
a: Blocking ventilation filters | b: Using efficient appliances and switching off unused devices | c: Leaving every light on | d: Opening a refrigerator door for long periods Read more
✅ B. Total greenhouse-gas emissions associated with an activity or entity
a: A shoe mark in soil | b: Total greenhouse-gas emissions associated with an activity or entity | c: A tree's height | d: The weight of coal only Read more
✅ B. Ocean absorption of excess atmospheric carbon dioxide
a: Extra oxygen dissolving | b: Ocean absorption of excess atmospheric carbon dioxide | c: Sand movement only | d: Moonlight Read more
✅ A. The variety of living organisms in an area or on Earth
a: The variety of living organisms in an area or on Earth | b: A type of fossil fuel | c: The amount of traffic only | d: The height of a mountain Read more
✅ A. Troposphere
a: Troposphere | b: Thermosphere | c: Mesosphere | d: Exosphere Read more
✅ B. Absorbing much of the Sun's harmful ultraviolet radiation
a: Creating all rainfall | b: Absorbing much of the Sun's harmful ultraviolet radiation | c: Producing Earth's gravity | d: Blocking all visible light Read more