There are a number of measures that can significantly reduce harmful emissions into the environment and reduce the cost of operating airports and train stations. Special materials are being developed: low-carbon concrete, wood, photocatalytic membranes, bio-fuels, etc. Many airports are introducing solar panels. To optimize costs, airports are replacing lighting with LEDs and installing energy conservation systems. Transportation for apron traffic and connections to the city is being changed to electric or biofuel-powered cars.
Individual improvements, however, will not make a significant difference. To achieve neutrality, a comprehensive environmental strategy is needed: from switching to renewable energy sources to breeding bees near the site.