Why don t they put screens over jet engines?
Why don t they put screens over jet engines? The extra weight of a screen would decrease fuel efficiency. But the main reason is concern that screens would impede airflow into engines, possible causing an engine to shut down. Screens could ice over – airliners typically cruise at altitudes where temperatures are well below zero. Ice would also disrupt airflow.
How bad are jet engines for the environment?
The combustion of hydrocarbon fuels—by aircraft engines as well as other types of internal combustion engines— produces carbon dioxide (CO2), water vapor, NOx, carbon monoxide (CO), oxides of sulfur (SOx), unburned hydrocarbons, particulates (primarily soot, which in high enough concentrations is visible as smoke), and ...