Earth & Environmental Sciences
electricity
78%
household
74%
province
56%
autumn
56%
crop residue
54%
winter
54%
metal
53%
coal
44%
energy
43%
solid fuel use
39%
particulate matter
37%
indoor air pollution
30%
indoor air quality
26%
indoor air
25%
gas
22%
air pollutant
21%
rural area
20%
petroleum
17%
heating
15%
health
15%
biomass
13%
liquid
13%
exposure
12%
trend
11%
Chemical Compounds
Electricity
100%
Coal
64%
Energy
42%
Metal
40%
Indoor Air Pollution
40%
Liquefied Petroleum Gas
32%
Air Pollutant
30%
Fuel
18%
Gas
11%
Time
8%
Engineering & Materials Science
Metals
57%
Electricity
43%
Kitchens
39%
Coal
36%
Crops
33%
Indoor air pollution
24%
Cooking
17%
Gases
17%
Air quality
16%
Biomass
13%
Crude oil
12%
Health
10%
Heating
10%
Liquids
9%
Air
8%