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Lecture

ENVS 1000 Feb. 20 Water.doc

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Department
Environmental Studies
Course
ENVS 1000
Professor
Peter Timmerman
Semester
Winter

Description
Wednesday, February 27, 2013 WATER The only substance that can be in all 3 physical states altogether within a reasonable temperature range. Earth is situated in a way that allows water vapour/water/ice to be present simultaneously. It has a high retention rate (holds high temperatures) and balances heat extremes. Water vapour holds and moves heat around. Positioning of hydrogen and oxygen atoms slightly polarizing, it makes water a good solvent. Water’s structures (hydrogen and oxygen) gives itself a slightly polarized energy to create bonds. Ice It is less dense than water, which allows it to float. It acts as an insulator over lakes and other large bodies of water, so that life can continue underneath. Water and You Since humans are made up of mostly water, they are susceptible to everything that is in the water. Turgidity is what keeps humans from looking dehydrated and shriveled. Average home consumes about a million litres of water every few years. Religions and Water Symbols There are two different kinds of water: 1) saltwater – dangerous and kills agriculture; 2) freshwater – cleans and refreshes. It comes down from the sky or a mysterious source. In different traditions, water and gardens are very important to the tradition. Whether it is its existence or sound. It symbolizes cleansing. Water as a public good- used for drinking. Water- is always passing, it changes, it holds together but transforms. Water is a metaphor for the soul or life itself. Shinto tradition: a place of rivers and movement of water is a place of transforming power. You are supposed to gather or garnering these falls of water. Media Water is used a lot in advertising- it connotes sex appeal and “hot”/”cold” Water Cycle Ground water flow occurs in the soil Water in the World Most of the water in the world is saltwater, and thus not for drinking. A small percentage is freshwater. There is not a lot of water for human access. World water consumption is increasing. Global water situation: there are more than 2 billion people who are under water stress, which means they are not accessing enough water. Many people rely on groundwater and springs, which are essentially tapping into groundwater as opposed to lakes. Some of it are from aquifers from many years ago. Most of the water withdrawals are from agriculture. Currently, it is very wasteful. Water pricing: governments subsidize this. Citizens normally do not pay the full price of water. There is a lot of agricultural water use, then domestic usage for those in developed countries and then industrial. About 1 billion people still have little to no access to freshwater and is leading to many deaths. Water Wars E.g. the Nile River is essential to the existence of Egypt. Water lines
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