reservoir

An inspection found the right engine’s oil reservoir was nearly empty, with enough oil leaking into the bleed air supply to fill the aircraft with white smoke.

The toll of the war and Western sanctions have made extracting oil out of Russia’s already shrinking reservoirs harder.

In Bolivia, fires affected over 9% of the country's remaining intact forest cover, which is a dramatic blow to a region that has historically served as a vital biodiversity reservoir and carbon sink.

The Colorado River, which provides water across the Southwest, has lost about 20% of its flow in the last quarter-century, and its depleted reservoirs continue to decline.

In the Sierra Nevada, the snow that blankets the rugged landscape each winter melts and gushes in meadows, streams and rivers, nourishing alpine ecosystems and filling reservoirs.