Final answer:
Burning gasoline at a refinery, releasing fumes at a chemical plant, and emitting particles from a dump truck are sources of outdoor air pollution.
Step-by-step explanation:
The processes that are sources of outdoor air pollution can be noted as -
- Burning gasoline at a refinery: When gasoline is generally burned at a refinery, it releases various pollutants and toxic gases into the atmosphere.
- Releasing fumes at a chemical plant: Chemical plants often release harmful fumes during their manufacturing processes, which contribute to outdoor air pollution.
- Emitting particles from a dump truck: Dump trucks can release pollutants in the form of particles, such as dust and exhaust emissions.
Thus, these processes contribute to outdoor air pollution by releasing harmful substances and particles into the atmosphere.