One way to reduce global pollution would be to

conserve energy
purchase disposable items
throw everything in the garbage
drive to work everyday

This question is really easy lol it would be to conserver energy. 

Answer;

Conserve energy

Explanation;Energy conservation and pollution reduction go together. Energy Conservation helps reduce some of the energy required and thereby help reduce air pollution.Conservation of energy for instance helps reduce the dependency on fossil fuels, thereby minimizing the amount of air pollution from burning of fossil fuels. Additionally, energy conservation reduces over-exploitation and depletion of forest cover which in turn helps restore air quality. It also reduces the number of construction activities which in turn limits the amount of dust released in the atmosphere.