Environmental Impact, Sustainability Principles, and Indicators

Environmental Impact

Environmental impact refers to any change in the composition and conditions of the environment introduced by human action, which alters its natural state and degrades its initial quality.

Causes

• Changes in land use
• Pollution
• Loss of biodiversity
• Overfishing
• Neglect of human activities

Rating

• Local: Specific impacts affecting a defined area.
• Regional: Impacts spread over large areas, potentially affecting multiple countries.
• Global: Impacts spanning wide geographical areas or the entire planet, such as ozone layer depletion, biodiversity loss, and water scarcity.

Principles for Sustainable Development

1. Sustainable Harvesting: Managing resources to ensure long-term availability.
2. Sustainable Discharge: Managing waste output to prevent environmental harm.
3. Sustainable Emission: Controlling emissions to maintain atmospheric balance.
4. Sustainable Technology: Selecting technologies that minimize environmental impact.
5. Zero Irreversibility: Ensuring actions do not cause permanent environmental damage.
6. Equitable Development: Promoting growth that is fair and sustainable for all.

Environmental Indicators

An environmental indicator is a variable or assessment that provides information on the status or progress of a specific environmental problem. These are used during the decision-making process to determine the best measures to address and correct issues.

Goals

• Ecological sustainability
• Economic sustainability
• Social sustainability

Types of Indicators

• Pressure indicators
• State indicators
• Response indicators

The Ecological Footprint

The ecological footprint represents the area of ecologically productive land required to produce the resources consumed and to assimilate the waste produced by a defined population with a specific standard of living indefinitely.

Biomass

Biomass is the total amount of organic matter constituting living organisms, consisting of carbon-based molecules.

Volcanic Eruptions

Volcanic eruptions exert a dual effect on the climate:

• Short-term temperature decrease: Caused by the emission of dust and SO2. This decline is more significant and lasts longer based on the altitude reached by the emissions.
• Long-term temperature increase: Caused by an increased greenhouse effect due to CO2 emissions. This effect becomes noticeable once the short-term cooling effect dissipates.

Variations in Solar Radiation

• Periodic variation: Influenced by the eccentricity of Earth's orbit, the inclination of the axis, and the position at perihelion.
• Gradual changes: Long-term shifts in solar intensity.