Earth Lakes Are Under Threat Reading Answers _hot_ Jun 2026

Since 1985, global lake surface temperatures have risen by an average of 0.34°C per decade — nearly three times the warming rate of the oceans. As warming continues, oxygen flow to deeper waters is threatened, and lakes increasingly fail to fully mix their waters, leading to anoxic conditions and ecosystem collapse.

While climate change is a significant threat, the over-abstraction of water for human use often has a more immediate and direct impact. This happens when water is diverted from lakes and their feeding rivers for various purposes:

A river or stream that flows into a larger river or lake. Anthropogenic: Caused or influenced by humans.

Deep lakes recover from microplastic pollution faster than shallow lakes. Answer: NOT GIVEN earth lakes are under threat reading answers

The passage highlights: climate change (0.34°C warming per decade), agricultural water diversion (rice, cotton), pollution (mining runoff), and overfishing leading to protein scarcity.

Paragraph 1 cites the Science study, providing this specific figure to emphasize the magnitude of loss. This is a numerical detail question, commonly tested in reading comprehension exams.

For some lakes, the biggest threat is from . On average, the surface water of the world's lakes has gone up in temperature by 0.34°C every ten years since 1985. Lake Tanganyika in East Africa is a lake where this trend has been observed, although it is by no means the most extreme example. This would be Lake Fracksjon in Sweden, where an increase of 1.35°C per decade has been observed - a figure which is estimated to rise. For Lake Tanganyika, however, the consequences have been severe. Warming has disrupted its ecosystem, and fish numbers have dropped sharply. In turn, this decline in fish stocks has impacted on families living in villages and towns around the lake, since they have no other source of protein. Furthermore, around 100,000 people depend on the fisheries established around Lake Tanganyika. Since 1985, global lake surface temperatures have risen

The passage typically discusses how freshwater lakes around the world are facing multiple environmental pressures, including climate change, pollution, invasive species, over-extraction of water, and eutrophication. It often highlights case studies like Lake Baikal, the Great Lakes of North America, and Lake Victoria.

: Commercial fisheries suffer, threatening the direct employment of more than 100,000 people who depend on the lake for survival. 4. Lake Urmia (Iran): Microscopic Shifts and Economic Loss

Rising global temperatures increase evaporation rates. Even in areas with stable rainfall, the sheer heat causes lakes to lose water faster than they can be replenished. Furthermore, changes in precipitation patterns mean that the snowpack—which acts as a "water tower" for many lakes—is melting earlier and faster, leading to late-season droughts. This happens when water is diverted from lakes

A large natural or artificial lake used as a source of water supply.

| Word | Meaning | Context | |------|---------|---------| | | redirected/changed direction | "Water from these rivers was diverted for irrigation purposes" | | Irrigation | artificial water supply for agriculture | Projects supplying water to crops in dry areas | | Radius | circular distance from a center point | "Salt is carried by the wind across a radius of 300 kilometers" | | Disrupted | interrupted/disturbed normal function | "Warming has disrupted its ecosystem" | | Downturn | decline/economic or activity reduction | "A downturn in tourism in the area" | | Stopover | intermediate resting place | The lake was a "stopover point for thousands of birds" | | Shallow | not deep | "Bacteria quickly multiply in the warm waters of a shallow lake" | | Unprecedented | never before seen/known | Modern changes are on an unprecedented scale |