Mitigation and adaptation
This gas accounts for half of all GHG emissions
Methane
Example of a transfer in the water cycle
Floods, percolation, other possible answers
This human activity is the single biggest drain on water
Agriculture
The most renewable food produced by the ocean
Seaweed (also accept jellyfish)
This is the "motor" of the water cycle
The sun
This describes deliberate large-scale interventions in the Earth’s natural systems to counteract climate change
Geoengineering
Sublimation
The conversion between the solid and the gaseous phases of water, with no intermediate liquid stage.
The largest dam in Italy
Vajont
These give us 99% of the ocean's primary productivity
Plankton
Name for energy produced close to the point of consumption
This is a solid material obtained from burning of biomass. It converts agricultural waste into a soil enhancer.
Biochar
Porosity and this other quality determine whether it is easy to draw from ground water
Permeability
This type of water is never available for capture or storage because it evaporates from the ground or transpires from plants.
"Green" water
These stretch 12 nautical miles from the baseline of a coastal state
Territorial waters
The world's largest power station
The Three Gorges Dam
This states that if an action or policy has a suspected risk of causing harm to the public, or to the environment, in the absence of scientific consensus, the action should not be taken
The precautionary principle
Smaller than, but similar to, a drainage basin
Watershed
A person's drinking and bathing needs can be met with this much daily water
7.5 litres
These two countries are responsible for the majority of whale deaths
Japan and Norway
This quality has tended to make aquatic ecosystems resilient
This mitigation strategy involves increasing the reflectiveness of clouds and land surfaces
Albedo enhancement
Water has a residency time of about ten days in this store
The atmosphere
Type of agriculture that helps to improve infiltration rates
No tillage
Exceeding this can lead to mass extinction of some species, or regional disappearance.
Maximum sustainable yield
This type of commercial fishing is arguably the least environmentally friendly
Bottom trawl (also accept dredging)