Energy, Environmental Policy, and Climate Change

A comprehensive vocabulary review covering energy systems, mineral extraction, environmental statutes, air quality metrics, and climate change mitigation and adaptation strategies.

Levelized Cost of Energy (LCOE)

The average lifetime cost of producing electricity from a power source.

Fracking (Hydraulic Fracturing)

A method that injects water, sand, and chemicals underground to release oil and natural gas trapped in shale rock.

Yucca Mountain

A proposed long-term deep geological repository for high-level nuclear waste disposal.

Highway Trust Fund

The primary federal transportation funding source, supported mainly by fuel taxes to finance roads and infrastructure.

Vehicle Miles Traveled (VMT)

The total aggregate miles driven by all motor vehicles in a given area over a period of time.

Thacker Pass

A major domestic lithium clay deposit project located in Nevada designed to supply battery manufacturing and decrease reliance on foreign supply chains.

Urban Mining

The process of recovering valuable metals and critical minerals, such as gold, copper, cobalt, and rare earth elements, from discarded electronic waste (e-waste).

Surface Mining Control and Reclamation Act (SMCRA)

A 1977 federal law requiring mining companies to obtain permits, post financial bonds, and restore mined land to prevent environmental abandonment.

Mine Reclamation Process

The legally required sequence for restoring mined land: Reclamation Bond $\rightarrow$ Mining $\rightarrow$ Backfilling/Recontouring $\rightarrow$ Soil Replacement $\rightarrow$ Revegetation $\rightarrow$ Monitoring $\rightarrow$ Bond Release.

Mountaintop Removal Mining

A coal extraction practice in which entire mountain summits are blasted away to access coal seams, with displaced waste rock deposited into adjacent valleys.

Coal Ash

A toxic combustion residue created by burning coal that contains hazardous heavy metals including arsenic, lead, and mercury.

Abandoned Mine Lands (AML)

Legacy mining operations deserted without environmental cleanup, causing public safety hazards, acidic runoff, and water contamination.

Clean Air Act (CAA)

A cornerstone U.S. federal air-quality law that regulates air emissions, drastically lowers pollutant levels, and delivers public health benefits that greatly exceed compliance costs.

National Ambient Air Quality Standards (NAAQS)

Federal standards established by the EPA to regulate six major criteria pollutants: Carbon Monoxide ($CO$), Lead ($Pb$), Nitrogen Dioxide ($NO_2$), Ozone ($O_3$), Sulfur Dioxide ($SO_2$), and Particulate Matter ($PM$).

Cross-State Air Pollution Rule (CSAPR)

An EPA policy obligating upwind states to lower airborne emissions that cross borders and compromise air quality in downwind states.

Acid Rain

Precipitation containing high levels of sulfuric and nitric acids formed when sulfur dioxide ($SO_2$) and nitrogen oxides ($NO_x$) react in the atmosphere.

PM2.5

Fine particulate matter with a diameter smaller than $2.5\,\mu\text{m}$ that can penetrate deep into lung tissue and the bloodstream, causing severe cardiovascular and respiratory risks.

Cap-and-Trade

A market-based environmental regulatory system in which the government caps overall allowable emissions, issues permits, and permits facilities to buy and sell allowances.

Environmental Justice

The fair treatment and meaningful involvement of all people, irrespective of race, income, or origin, in environmental decisions and the equitable distribution of environmental burdens and benefits.

Threat Multiplier

The concept that climate change intensifies and exacerbates existing socioeconomic, environmental, and infrastructure challenges.

Phenological Mismatch

The disruption in timing among interconnected species when climate changes cause biological events—such as plant flowering and pollinator activity—to fall out of synchronization.

Ocean Acidification

The ongoing decrease in seawater pH caused by the ocean's uptake of anthropogenic carbon dioxide ($CO_2$) from the atmosphere.

Coral Bleaching

The expulsion of symbiotic algae by coral organisms induced by elevated water temperatures and heat stress, potentially leading to coral mortality.

100th Meridian

The historic climatic line of longitude separating the humid eastern United States from the arid western plains, which is being shifted eastward due to changing climate patterns.

Mitigation

Climate strategies targeted at addressing the root causes of climate change through greenhouse gas reductions and long-term prevention.

Adaptation

Climate strategies targeted at adjusting to the actual or expected impacts of climate change to build resilience and provide protection.

Bottom-Up Climate Policy

An governance approach where innovative environmental initiatives originate within local municipalities and counties and subsequently migrate upward to state and federal frameworks.

Renewable Portfolio Standards (RPS)

State-level regulatory mandates that require or incentivize electricity utilities to generate a designated percentage of power from renewable sources.

Paris Agreement

A 2015 multilateral climate treaty aimed at cutting greenhouse gas emissions, limiting global temperature rise, and strengthening worldwide commitments to climate action.