pollution

noun 0.847

air pollutant

noun 0.820

water pollution

noun 0.785

pollutant

noun 0.753

noise pollution

noun 0.718

antipollution

noun 0.670

visual pollution

noun 0.663

smog

noun 0.654

polluter

noun 0.632

air purifier

noun 0.630

particulate matter

noun 0.627

acid rain

noun 0.625

light pollution

noun 0.615

photochemical smog

noun 0.610

dirty weather

noun 0.604

air filter

noun 0.579

fresh air

noun 0.578

global warming

noun 0.574

passive smoking

noun 0.570

greenhouse gas

noun 0.569

environmental racism

noun 0.568

air pressure

noun 0.567

asthma

noun 0.562

environmental

noun 0.558

air

noun 0.555

aerosol

noun 0.553

pollen

noun 0.547

sulfur dioxide

noun 0.547

carbon dioxide

noun 0.547

carbon monoxide

noun 0.545

air cleaner

noun 0.544

emissions test

noun 0.543

food poisoning

noun 0.541

carbon footprint

noun 0.541

toxic waste

noun 0.540

nitrogen oxide

noun 0.539

chronic obstructive pulmonary disease

noun 0.534

nitrogen dioxide

noun 0.534

haze

noun 0.532

environmental science

noun 0.530

poisoning

noun 0.529

contamination

noun 0.527

hot air

noun 0.525

overpopulation

noun 0.525

smoke

noun 0.524

pollination

noun 0.523

air conditioning

noun 0.522

carbon tax

noun 0.522

poison

noun 0.522

compressed air

noun 0.521

oxygen

noun 0.521

atmosphere

noun 0.520

shortness of breath

noun 0.520

emissions trading

noun 0.520

environment

noun 0.519

flue gas

noun 0.519

wastewater

noun 0.518

ozone

noun 0.517

emphysema

noun 0.517

radioactivity

noun 0.517

greenhouse effect

noun 0.516

soot

noun 0.516

smoking

noun 0.516

brown cloud

noun 0.516

change of air

noun 0.515

forest fire

noun 0.514

lung cancer

noun 0.514

respiratory system

noun 0.512

black carbon

noun 0.511

pulmonary emphysema

noun 0.510

noise

noun 0.510

air travel

noun 0.510

asphyxia

noun 0.507

pneumonia

noun 0.506

contaminant

noun 0.505

public health

noun 0.505

bronchitis

noun 0.505

oxygen gas

noun 0.504

atmospheric pressure

noun 0.503

fossil fuel

noun 0.503

hazardous material

noun 0.502

fixed air

noun 0.502

asphyxiation

noun 0.502

air pump

noun 0.502

asthma attack

noun 0.501

environmentalism

noun 0.501

exhaust

noun 0.500