Matches in DBpedia 2016-04 for { ?s ?p "The hydrosphere (from Greek ὕδωρ - hydōr, \"water\" and σφαῖρα - sphaira, \"sphere\") in physical geography describes the combined mass of water found on, under, and over the surface of a planet.Igor Shiklomanov, the man selected by the United Nations to do its world inventory of water resources, estimated that there are 1386 million cubic kilometres of water on Earth. This includes water in liquid and frozen forms in groundwater, oceans, lakes and streams. Glaciers, against popular belief, are part of the cryosphere and not part of the Hydrosphere. Saltwater accounts for 97.5% of this amount. Fresh water accounts for only 2.5%. Of this fresh water 68.7% is in the \"form of ice and permanent snow cover in the Arctic, the Antarctic, and in the mountainous regions. Next, 29.9% exists as fresh groundwaters. Only 0.26% of the total amount of fresh waters on planet Earth is easily accessible. It is found in lakes, reservoirs and river systems, the principal elements of water ecosystems.\" The total mass of the Earth's hydrosphere is about 1.4 × 1018 tonnes, which is about 0.023% of the Earth's total mass. About 20 × 1012 tonnes of this is in the Earth's atmosphere (for practical purposes, 1 cubic metre of water weighs one tonne). Approximately 75% of the Earth's surface, an area of some 361 million square kilometers (139.5 million square miles), is covered by ocean. The average salinity of the Earth's oceans is about 35 grams of salt per kilogram of sea water (3.5%)."@en }
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- Hydrosphere abstract "The hydrosphere (from Greek ὕδωρ - hydōr, \"water\" and σφαῖρα - sphaira, \"sphere\") in physical geography describes the combined mass of water found on, under, and over the surface of a planet.Igor Shiklomanov, the man selected by the United Nations to do its world inventory of water resources, estimated that there are 1386 million cubic kilometres of water on Earth. This includes water in liquid and frozen forms in groundwater, oceans, lakes and streams. Glaciers, against popular belief, are part of the cryosphere and not part of the Hydrosphere. Saltwater accounts for 97.5% of this amount. Fresh water accounts for only 2.5%. Of this fresh water 68.7% is in the \"form of ice and permanent snow cover in the Arctic, the Antarctic, and in the mountainous regions. Next, 29.9% exists as fresh groundwaters. Only 0.26% of the total amount of fresh waters on planet Earth is easily accessible. It is found in lakes, reservoirs and river systems, the principal elements of water ecosystems.\" The total mass of the Earth's hydrosphere is about 1.4 × 1018 tonnes, which is about 0.023% of the Earth's total mass. About 20 × 1012 tonnes of this is in the Earth's atmosphere (for practical purposes, 1 cubic metre of water weighs one tonne). Approximately 75% of the Earth's surface, an area of some 361 million square kilometers (139.5 million square miles), is covered by ocean. The average salinity of the Earth's oceans is about 35 grams of salt per kilogram of sea water (3.5%).".