Condensation from the fogs also produces fog drip from trees overnight. It is also an island of mists and fogs. The climate varies between polar and moderate continental with frequent fogs and clouds. Delhi is notorious for its heavy fogs and haze during the winter season. The proximity of the sea causes frequent autumn rains and fogs. Experts said that ferocious winds and blinding fogs would prevent construction and operation. Snow falls even in summer and is alternating with fogs. Coastal summers are cool to mild, with average highs of and frequent fogs. A very wide variety of fuels may occur as gases, droplet fogs, or dust suspensions. There is a high incidence of winter and early spring fogs. Theobald sleeps with his head on the goddess's lap, with royal blue fogs surrounding him. Therefore, ground fogs caused by methane in the neighborhood of the landing site are unlikely. Morning fogs are common year round. Water-ice fogs have also been detected on Mars. This standard requires that grease interceptors remove a minimum of 90% of incoming FOGs.