GEOG 310 Lecture Notes - Lecture 7: Hydrogen Bond, Externality, Ecosystem Services
Document Summary
Unique: in terms of scientific analysis and in social space. Hydrogen bond = high heat capacity = high melting/freezing points: slight positive charge on one side, slight negative charge on another side. Exands when heated contracts when cooled: state changes = density changes. Water covers 70% of the earth, but it"s only 1/1000th of the earth"s volume. The most fundamental resource: drinking, cooking, washing, travelling, agriculture, manufacturing, mining, energy production and waste disposal, every major social and economic activity. Ecosystem services of water: shapes continents, moderates global climate, allows for organisms to survive, provisioning, regulating, supporting, cultural. Agriculture(since 1955) irrigated land has tripled continues to rise. Sector: similar trend, lots of waste produced. 1 billion people without access to safe water. 2. 5 billion without access to safe sanitation(world wide, expected to increase) 700 million or more living with high water stress": threshold of available water(1700 cubic meters per person) Population growth and economic costs likely to get worse, not better.
