Krillion prompt · October 22, 2026
Name an environmental problem (like pollution)
Krillion accepted 252 answers for this prompt in Dive #99. They’re all below, starting at the trench floor with the gem and rising to the Plankton everyone thinks of first.
Test a guess
Thinking of playing? Test a word before you look.
Notes on this prompt
- With 252 accepted answers, this prompt is narrower than a typical Krillion prompt (about 578), so there’s less room to go deep.
- 153 answers (61%) are Deep Cuts and 74 are Rare, while 5 sit at Plankton.
Quick picks
The shortest Rare or deeper answers, easy to type before the timer runs out.
Smog +60 Mining +60 Whaling +60
Also accepted elsewhere
The same answer counted for a different prompt in the archive.
Every accepted answer
One in a Krillion
The gem picked for each prompt. Trench floor.
- Nurdle pollution
A 2021 ship fire spilled billions of pellets onto Sri Lanka's coast.
Deep Cut
Real obscurity. This is where the list gets long.
- Acid mine drainage
- Acid sulfate soils
- Ammonia pollution
- AMOC weakening
- Amphibian decline
- Antimicrobial resistance in the environment
- Aquaculture pollution
- Arctic amplification
- Arsenic contamination
- Aviation emissions
- Ballast water discharge
- Bark beetle infestation
- Bioaccumulation
- Biomass burning
- Bird population decline
- Bird-window collisions
- Black carbon
- Blast fishing
- Brownfields
- Bushmeat hunting
- Bycatch
- Cadmium pollution
- Carbon sink loss
- Chromium contamination
- Clear-cutting
- Climate migration
- Coal ash
- Coal seam fires
- Coastal squeeze
- Construction waste
- Contaminants of emerging concern
- Coral mining
- Crown-of-thorns starfish outbreaks
- Cryptocurrency mining energy use
- Cyanide fishing
- Desalination brine
- Destructive fishing
- Dioxins
- Dolphin drive hunting
- Dredging
- Drift netting
- Ecosystem collapse
- Electromagnetic pollution
- Endocrine disruptors
- Energy waste
- Environmental racism
- Fatbergs
- Fireworks pollution
- Fish kills
- Fluoride contamination
- Footpath erosion
- Forest degradation
- Freshwater acidification
- Gas flaring
- Genetic pollution
- Ghost nets
- Gillnetting
- Global dimming
- Grassland loss
- Ground-level ozone
- Hazardous waste export
- Hedgerow loss
- Human-wildlife conflict
- Illegal fishing
- Illegal logging
- Illegal wildlife trade
- Indoor air pollution
- Industrial pollution
- Interplanetary contamination
- Jellyfish blooms
- Kelp forest decline
- Land pollution
- Land subsidence
- Land-use change
- Legacy pollution
- Lithium mining
- Locust swarms
- Loss of genetic diversity
- Mangrove loss
- Marine animal entanglement
- Mining waste
- Monoculture
- Muro-ami
- Nanopollution
- Nuclear testing
- Ocean deoxygenation
- Ocean dumping
- Ocean stratification
- Odor pollution
- Off-road vehicle damage
- Open burning of waste
- Open defecation
- Orphan wells
- Over-irrigation
- Overcultivation
- Overexploitation
- Overtourism
- Packaging waste
- PAH pollution
- PCB pollution
- Peat fires
- Peatland loss
- Persistent organic pollutants
- Pet waste
- Pharmaceutical pollution
- Quarrying
- Radon
- River damming
- Road salt pollution
- Roadkill
- Salinization
- Saltwater intrusion
- Sand mining
- Sargassum influx
- Seagrass loss
- Season creep
- Sediment pollution
- Selenium pollution
- Shark culling
- Shark finning
- Ship pollution
- Ship strikes
- Shipbreaking
- Shrinking lakes
- Slash-and-burn
- Snow cover loss
- Soil acidification
- Soil compaction
- Soil sealing
- Southeast Asian haze
- Species range shifts
- Stubble burning
- Sulfur dioxide pollution
- Sunscreen coral damage
- Tar sands
- Tire waste
- Tire wear pollution
- Tree disease
- Underwater noise pollution
- Unexploded ordnance
- Urban runoff
- Urban stream syndrome
- Visual pollution
- Volatile organic compounds
- War pollution
- Waste incineration
- Waste oil
- Water stagnation
- Waterlogging
- Wetland loss
- Wildlife disease
- Wind turbine bird deaths
- Woody plant encroachment
Rare
Genuinely uncommon. A strong pick on any prompt.
- Agricultural runoff
- Asbestos contamination
- Bee decline
- Biodiversity loss
- Bottom trawling
- Carbon monoxide pollution
- Chemical pollution
- Chemical spills
- Coastal erosion
- Coral bleaching
- Data center water and energy use
- Dead zones
- Deep-sea mining
- Desertification
- Electronic waste
- Environmental degradation
- Eutrophication
- Extinction
- Factory farming
- Fast fashion
- Food waste
- Glacier retreat
- Great Pacific Garbage Patch
- Groundwater depletion
- Groundwater pollution
- Habitat destruction
- Habitat fragmentation
- Harmful algal blooms
- Hazardous waste
- Heavy metal pollution
- Illegal dumping
- Industrial waste
- Insect decline
- Invasive species
- Land degradation
- Landfills
- Lead pollution
- Marine debris
- Marine pollution
- Medical waste
- Mercury pollution
- Mining
- Nuclear accidents
- Nuclear fallout
- Nutrient pollution
- Ocean acidification
- Ocean warming
- Oil drilling
- Overconsumption
- Overfishing
- Overgrazing
- Overhunting
- Particulate matter
- Permafrost thaw
- Pesticide pollution
- PFAS
- Poaching
- Radioactive pollution
- Resource depletion
- Sewage pollution
- Smog
- Smoke pollution
- Soil erosion
- Soil pollution
- Space debris
- Textile waste
- Thermal pollution
- Urban heat island
- Urban sprawl
- Vehicle emissions
- Wastewater pollution
- Water overuse
- Water scarcity
- Whaling
Schooler
Solid, but you’re swimming with the crowd.
- Acid rain
- Deforestation
- Drought
- Fracking
- Greenhouse effect
- Greenhouse gas emissions
- Light pollution
- Littering
- Melting ice caps
- Microplastics
- Noise pollution
- Nuclear waste
- Oil spills
- Overpopulation
- Ozone depletion
- Plastic pollution
- Sea level rise
- Waste
- Wildfires
Plankton
The first thing everyone thinks of.
- Air pollution
- Climate change
- Global warming
- Pollution
- Water pollution
More from Dive #99
- Name a character from Attack on Titan, One Piece or Naruto
- Name a job with median annual pay over $100,000 in the US
- Name a game with a number in its name (sequels and 3D variants don't count)
- Name a field, art or skill ending in -graphy
- Name a country with a five-letter English name
- Name a South Asian dish (India, Pakistan, Bangladesh, Sri Lanka, Nepal, Bhutan, Maldives, Afghanistan)