RNR 1001 Chapter : RNR 12 Sep
Document Summary
Most models show a slow rate of increase and population will be around 9 bil by 2100. Absolute biological limit versus a desired standard of living. Estimates the planet can hold between 4 to 20 billion. One approach to this is the ecological footprint. Carbon uptake - the amount of forest land required to absorb co2 emissions from burning fossil fuels, land-use change and chemical processes, other than the portion absorbed by oceans. Grazing land - the area used to raise livestock for meat, dairy, hide, and wool. Forest products - the amount of lumber, pulp, timber products and fuel wood consumed by a country each year. Fisheries - the primary production required to support the fish and seafood caught, based on catch data for 1,439 marine and 268 freshwater species. Cropland - the area used to produce food and fiber for human consumption, feed for livestock, oil crops, and rubber.
