Answer:
The correct answer is gas
Explanation:
They can also be called carbon emissions, CO2 emissions, or greenhouse gas emissions. Contaminating smoke from factories is made up mostly from burning fuels residues, and it includes solid particles and gases like the carbon dioxide, methane and nitrous oxide. These chemicals pollute the air and bring terrible consequences to health, especially respiratory disorders and diseases like cancer and brain strokes.
1st one is Confucianism
2nd one is Legalism
3rd one is Taoism
Democracy improved people's living conditions for it allows people to choose the jobs they want, and it helped them be more productive becuz they did what they liked XD