In the electromagnetic spectrum, the strength and efficacy of wireless transmission will be reduced as temperatures rise. The refractive index of the atmosphere is highly dependent on humidity and severely affects the curvature of electromagnetic waves, along with the rate at which they fade. Increased temperatures and rainfall will shift the beams of point-to-point data links – such as microwave transmissions – and attenuate broadcast signals. As the earth warms and becomes wetter, ever-greater densities of wireless masts will be required, and maintenance will become more difficult.