Global investment in drones and robotics technologies for transmission and distribution systems is expected to total nearly $16.2bn from 2015 to 2024, according to a Navigant Research report.

The market for indoor environmental and air quality (IEAQ) technologies used in new construction and retrofit applications is expected to grow from $4.2bn in 2015 to $7.1bn by 2024, according to a Navigant Research report.

Annual sales of fuel cell vehicles, both passenger cars and buses, are expected to exceed 228,000 by 2024, according to a report from Navigant Research.

Global wireless power revenue is expected to grow from $1.3bn in 2015 to $17.9bn in 2024, according to a report from Navigant Research.

To inspect the blades of the more than 270,000 wind turbines operating globally, technicians have traditionally relied on binoculars and field scopes from the ground, or have scaled the turbines with the help of ropes or cables. Today, unmanned aerial vehicles are providing a safer option, with the benefit of higher-resolution imaging. Cumulative global revenue for wind turbine UAV sales and inspection services is expected to reach nearly $6bn by 2024, according to a Navigant Research report.

Some 85 million autonomous-capable vehicles are expected to be sold annually around the world by 2035, according to Navigant Research.