A controversial plan to fight climate change by dimming the sun could choke the airlines with clouds of sulphuric acid, scientists have warned.As human-caused climate change continues to accelerate, some researchers are now considering dramatic geoengineering solutions to hold off the worst effects.One of the most popular solutions involves injecting tiny aerosol particles into the stratosphere to reflect heat from the sun back into space.However, researchers now warn that this could expose passengers and crew on commercial airlines to 'hazardous' levels of toxic chemicals.Most proposals for 'stratospheric aerosol injection' (SAI) involve releasing sulphur dioxide gas, which transforms into reflective sulphate particles in the atmosphere.Commercial airlines typically route air through a compressor in the engine, through an environmental control system, and into the cabin.But when sulphur dioxide is sucked up through this system, it reacts to form choking sulphuric acid.Lead author Professor Alan Robock, of Rutgers University, told the Daily Mail that this could be hazardous for passengers and crew members who fly routinely. Scientists warn that a controversial method to dim the sun by injecting aerosols into the atmosphere could choke aircraft flying over the poles with sulphuric acid. Pictured: Predicted concentrations of sulphuric acid Scientists often describe the problem of climate change as an energy imbalance in Earth's climate system.As greenhouse gases build up in the atmosphere, more energy remains trapped than can escape out to space, causing the planet to warm.Since greenhouse gas emissions have risen to their highest levels on record, some scientists don't think we have time to balance the equation by reducing the amount of heat the atmosphere traps.Instead, some scientists have suggested we should start looking at ways of reducing the amount of energy coming into the system in the first place.Professor Robock explains: 'One of the proposed climate intervention schemes is to emulate large volcanic eruptions by producing a cloud of sulphuric acid droplets in the stratosphere to reflect sunlight and cool Earth.'Because there is no rain in the stratosphere, the atmospheric layer above the troposphere where we live, the droplets would last 50 times longer than surface pollution.'However, the technique remains extremely controversial since scientists are unsure what the side effects could be.A recent study conducted by Columbia Climate School found that Stratospheric Aerosol Injection could wreak havoc on global weather patterns.