What does the IUCN Red List do?

Assesses species against set criteria and assigns each a category of extinction risk

Ranks countries according to their pollution levels

Records the boundaries of every protected area worldwide

Lists the species newly described by scientists each year

CITES is an international agreement regulating what?

Trade in wild animals and plants across national borders

Greenhouse gas emissions from shipping

Fishing quotas in international waters

The use of pesticides on farmland

An invasive species is best defined as what?

A species introduced outside its natural range that spreads and causes harm

Any species that is not native to the country in question

A species that outcompetes others within its own home range

A species released deliberately to control an agricultural pest

What is a wildlife corridor intended to do?

Connect separated patches of habitat so animals can move between them

Keep large animals away from farmland and villages

Guide migratory birds along a single fixed route

Provide a route for visitors to travel through a reserve

The Montreal Protocol, agreed in 1987, was aimed at which problem?

Depletion of the ozone layer by chlorofluorocarbons

Acid rain from coal-fired power stations

The loss of tropical rainforest

Contamination of groundwater by nitrates

Why are wetlands valued out of all proportion to the area they cover?

They filter water, absorb floodwater and support unusually dense wildlife

They supply most of the world's commercial timber

They are the source of nearly all drinking water

They release almost no carbon compared with other habitats

Rewilding generally means what?

Restoring natural processes and letting an ecosystem run itself with less intervention

Replanting an area with a single fast-growing commercial species

Fencing land off to exclude all human access permanently

Breeding threatened animals in captivity for public display

Acid rain is caused mainly by which emissions?

Sulfur dioxide and nitrogen oxides from burning fossil fuels

Carbon dioxide from road vehicles alone

Mineral dust from quarrying and mining

A marine protected area typically does what?

Restricts fishing and other activities within a defined stretch of sea

Bans all shipping from the region entirely

Applies only to the sea floor and not the water above it

Covers only waters outside any country's jurisdiction

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Environment & Climate Easy ⚡ 10 Questions ⏱️ ~6 Mins +100 XP

Conservation and Protected Land

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Conservation runs on a small toolkit of parks, treaties, lists and legal categories. Here is what each of them is for.

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~6m

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About this topic

Protecting nature turns out to be an administrative craft as much as a scientific one. A species has to be assessed against criteria before anyone can argue it is endangered, which is what the IUCN Red List exists to do. Trade across borders has to be licensed or banned, which is what CITES does. Habitat has to be given a legal status, which is what national parks, wetland designations and marine protected areas do, each with its own rules about what remains permitted inside. Some of this machinery has worked strikingly well. The Montreal Protocol dealt with ozone-depleting chemicals quickly, helped by the fact that a small number of industrial compounds had workable substitutes. Other problems are harder because the damage is diffuse and the causes are ordinary. The questions here cover the main instruments, the reasoning behind wildlife corridors and rewilding, and why small isolated populations are so much more fragile than their numbers suggest.

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Conservation and Protected Land: all 10 questions and answers

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1What does the IUCN Red List do?
- A Lists the species newly described by scientists each year
- B Assesses species against set criteria and assigns each a category of extinction risk Correct
- C Ranks countries according to their pollution levels
- D Records the boundaries of every protected area worldwide
Answer: B. Assesses species against set criteria and assigns each a category of extinction risk

Why: The categories run from Least Concern up to Extinct in the Wild, and species do move back down the list when protection works.
2CITES is an international agreement regulating what?
- A Trade in wild animals and plants across national borders Correct
- B Greenhouse gas emissions from shipping
- C Fishing quotas in international waters
- D The use of pesticides on farmland
Answer: A. Trade in wild animals and plants across national borders

Why: It works by listing species in appendices that either ban trade or require permits, and it has been in force since 1975.
3Which national park, established in 1872, is generally considered the world's first?
- A Banff
- B Kruger
- C Yosemite
- D Yellowstone Correct
Answer: D. Yellowstone

Why: Its geysers and hot springs were the immediate reason for protecting it. Yosemite land had been set aside for the state of California eight years earlier but was not yet a national park.
4An invasive species is best defined as what?
- A A species that outcompetes others within its own home range
- B A species released deliberately to control an agricultural pest
- C A species introduced outside its natural range that spreads and causes harm Correct
- D Any species that is not native to the country in question
Answer: C. A species introduced outside its natural range that spreads and causes harm

Why: Most introductions fail or stay harmless. Islands suffer worst, because their native species often evolved with no ground predators or grazing mammals at all.
5What is a wildlife corridor intended to do?
- A Provide a route for visitors to travel through a reserve
- B Connect separated patches of habitat so animals can move between them Correct
- C Keep large animals away from farmland and villages
- D Guide migratory birds along a single fixed route
Answer: B. Connect separated patches of habitat so animals can move between them

Why: Small isolated populations lose genetic diversity and can be wiped out by one bad year, so connection between patches matters nearly as much as total area.
6The Montreal Protocol, agreed in 1987, was aimed at which problem?
- A Depletion of the ozone layer by chlorofluorocarbons Correct
- B Acid rain from coal-fired power stations
- C The loss of tropical rainforest
- D Contamination of groundwater by nitrates
Answer: A. Depletion of the ozone layer by chlorofluorocarbons

Why: It is often called the most effective environmental treaty ever agreed, helped by the fact that only a handful of industrial chemicals were involved.
7Why are wetlands valued out of all proportion to the area they cover?
- A They supply most of the world's commercial timber
- B They are the source of nearly all drinking water
- C They release almost no carbon compared with other habitats
- D They filter water, absorb floodwater and support unusually dense wildlife Correct
Answer: D. They filter water, absorb floodwater and support unusually dense wildlife

Why: The Ramsar Convention of 1971 was the first modern treaty devoted to a single habitat type, and it is named after the Iranian city where it was signed.
8Rewilding generally means what?
- A Fencing land off to exclude all human access permanently
- B Breeding threatened animals in captivity for public display
- C Restoring natural processes and letting an ecosystem run itself with less intervention Correct
- D Replanting an area with a single fast-growing commercial species
Answer: C. Restoring natural processes and letting an ecosystem run itself with less intervention

Why: Returning a missing grazer or predator is often the trigger, and the outcome is deliberately left unplanned rather than managed toward a fixed target.
9Acid rain is caused mainly by which emissions?
- A Mineral dust from quarrying and mining
- B Sulfur dioxide and nitrogen oxides from burning fossil fuels Correct
- C Carbon dioxide from road vehicles alone
- D Methane released by livestock
Answer: B. Sulfur dioxide and nitrogen oxides from burning fossil fuels

Why: They form acids in the atmosphere and can fall hundreds of kilometres downwind, which made this one of the first pollution problems to require treaties between states.
10A marine protected area typically does what?
- A Restricts fishing and other activities within a defined stretch of sea Correct
- B Bans all shipping from the region entirely
- C Applies only to the sea floor and not the water above it
- D Covers only waters outside any country's jurisdiction
Answer: A. Restricts fishing and other activities within a defined stretch of sea

Why: Rules range from partial limits to full no-take reserves, and fish inside tend to grow larger and more numerous, with some spillover into surrounding waters.

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