At the other extreme mountainous regions can be windy, cold, and areas at elevation of 750 meters or more (same elevation as Jerusalem) will usually receive at least one snowfall each year. From May to September, rain in Israel is rare. With scarce water resources, Israel has developed various water-saving technologies, including drip irrigation. Israelis also take advantage of the considerable sunlight available for solar energy, making Israel the leading nation in solar energy use per capita (practically every house uses solar panels for water heating).

Israel developed what?