Annual global solar photovoltaic (PV) installations in 2019 are forecast by IHS Markit to rise 18 percent, reaching 123 gigawatts (GW) in 2019.
Whether solar panels become dirty depends on the local conditions. Under normal circumstances there should not be a problem, because the panels do not get dirty enough.
A new and interactive online map helps to highlight exemplary projects in modern city planning to do with solar systems. It is targeted at city planners and architects who are involved in implementing state-of-the-art city quarters.