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Concepts

Ideas, terms, and mechanisms explained clearly.

A power plant cooling tower with a chimney, a major source of emissions that contribute to a carbon footprint

Carbon footprint

A carbon footprint is the total amount of carbon dioxide, and often other greenhouse gases converted into a carbon dioxide equivalent, linked to the activities of a person, organization, product, or country, usually measured in tons of CO2 or CO2 equivalent per year. It covers both direct emissions, such as fuel burned in a car,

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A carbon footprint is the total greenhouse gas emissions, measured in tons of CO2 equivalent, linked to a person, organization, or activity.

Dense forest vegetation, one of the natural systems that takes in and stores carbon

Carbon sink

In simple terms A carbon sink is anything that takes in more carbon than it gives back, so its net effect is to pull carbon dioxide out of the air and hold it somewhere else. The ocean, forests and soils are the large natural ones. The opposite is a carbon source, which releases more than

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A carbon sink is anything that absorbs and stores more carbon than it releases, such as the ocean, forests or soils.

A rowing crew competing, a sport demanding high cardiorespiratory fitness

Cardiorespiratory Fitness

Overview Cardiorespiratory fitness reflects how well the heart, lungs, and blood vessels work together to deliver oxygen to muscles during sustained activity, and it is one of the most widely studied measures in exercise science because of its relevance to both athletic performance and general health. Assessment Methods While precise laboratory testing requires specialized equipment,

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The combined ability of the heart, lungs, and circulatory system to supply oxygen to working muscles during sustained physical activity.

A caregiver assisting a person with daily paperwork and support needs

Caregiver Support Programs

Caregiver support programs are services designed to support the family members and friends who provide unpaid care to an aging or disabled loved one, a group that collectively provides the vast majority of long-term care hours delivered in the United States, far exceeding the hours provided by paid professional caregivers. Common Support Services Respite care,

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Services designed to support the family members and friends who provide unpaid care to an aging or disabled loved one.

Financial market index data displayed on a trading screen

Carry trade

In simple terms A carry trade is a bet on the gap between two interest rates. An investor borrows cheaply in one currency and puts the money to work in another that pays more. The borrowed currency is called the funding currency. The one bought with it is the target currency. The profit, if it

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A carry trade borrows money in a currency with low interest rates and invests it where rates are higher, aiming to keep the difference.

A large wildebeest herd migrating across the Serengeti

Carrying capacity

Carrying capacity is the maximum population size of a species that a given environment can sustain indefinitely, given the food, water, habitat, and other resources actually available to it. The concept applies across scales, from a single pond’s fish population to an entire planet’s human population, and it sits at the center of how ecologists

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Carrying capacity is the maximum population size an environment can sustain indefinitely, given its available resources.

FEMA caseworker meets with a homeowner during a case recertification visit

Case Management

Purpose and Core Functions Case management emerged as a social work method to address a persistent problem facing clients with complex needs, namely the fragmentation of services across many different agencies and providers that rarely coordinate with each other directly. A case manager serves as a consistent point of contact who understands a client full

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Case management is a social work practice method in which a professional coordinates services, resources, and support across multiple providers to help a client meet complex needs over time.

Folded U.S. twenty-dollar banknotes representing cash movement

Cash Flow Statement

A cash flow statement, also called a statement of cash flows, is a financial report that tracks the actual cash moving into and out of a business over a given period. Alongside the balance sheet and income statement, it forms the third of the three core financial statements that companies prepare under both Generally Accepted

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A financial statement that tracks the actual cash moving into and out of a business across operating, investing, and financing activities.

Catalyst (chemistry)

In simple terms A catalyst makes a chemical reaction go faster. It takes part in the reaction, then comes out unchanged and ready to work again. It does not force a reaction that could not happen anyway. It shortens the route to one that was already possible. How it works IUPAC defines a catalyst as

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A catalyst is a substance that speeds up a chemical reaction without being consumed and without changing the reaction's overall energy balance.

Fish landed and sorted at a market, reflecting catch brought in under regulated limits

Catch Limit

A catch limit is a legally enforceable cap on the amount of a fish species that can be harvested from a given stock within a set period, usually a year. Catch limits are the central tool fisheries managers use to translate scientific stock assessments into binding restrictions on commercial and recreational fishing. How Catch Limits

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A legally enforceable cap on how much of a fish species can be caught in a given period.