Earth has Finite Resources This means Earth only has so much of a resource, like coal or aluminum. Overuse of the resources can put stress on natural processes
Natural Resources any material or organism in the biosphere that can be used Ex: trees, wind, iron, oxygen
Resources Nonrenewable- natural resource available in limited amounts or replaced extremely slowly by natural processes Renewable- natural resource replaced by natural processes more quickly than it is consumed
Sustainable Use when resources are used at the same rate they are replaced
Biodegradable material that can break down easily and quickly Think Compost Pile!
How Natural Ecosystems Affect Humans Maintenance of quality of atmosphere Generation of soils Control of water cycle Removal of wastes Energy flow Recycling of nutrients If humans change these processes it could result in a very negative impact
Human Activities have an Impact Alter equilibrium in an ecosystem through: –Population growth –Consumption –Technology –Pollution –Destruction of habitats
Deforestation - Cutting down of forest habitats Settlers cut and burn a section of rainforest in the Petén region of Guatemala to clear the land.
Land Usage Decreases space and resources for other species
Pollution Changes chemical composition of air, soil, and water Example: –acid rain- rain with acidic pH due to carbon dioxide, sulfur dioxide, or nitrogen oxides