FEEDING THE BEARS

Using the very best of today's available carbon source, such as oil, and advanced manufacturing technology, it is very easy to produce enough plastic to cover large swaths of the Arctic sea. After all, plastic floats, it's durable (as evident by all plastic bags surviving for decades and more in the sea), can be made in a suitable ice-looking color, could be made with holes for that refreshing morning dip and can be made strong enough at relatively limited thickness to take a whole family of polar bears as well as for seals to give birth to their cubs during spring. Could this be a solution!? ;-D

WIKIPEDIA (so use it lightly) This list is incomplete; you can help by expanding it.
Subspecies name
Ursus arctos arctos – Eurasian brown bear Europe, Caucasus, Siberia (except the east) and Mongolia[15] A predominantly dark colored (rarely light colored), moderately sized subspecies with dark claws, the Eurasian browns occurring in Siberia are larger than their European counterparts, as they are hunted less.[15] Where found in Europe, primarily a forest creature

Ursus arctos alascensis[16] Alaska

Ursus arctos beringianus – Kamchatka brown bear (or Far Eastern brown bear) Kamchatka Peninsula and Paramushir Island[15] This is a very large, dark colored form. Light colored forms are encountered less than in European-Siberian subspecies. The claws are dark;[15] it is thought to be the ancestor of U. a. middendorffi.[10]

Ursus arctos californicus – California golden bear (extinct) California The last known bear was shot in California in 1922.

Ursus arctos collaris – East Siberian brown bear East Siberia from the Yenisei River to the Altai Mountains, also found in northern Mongolia A predominantly dark form, it is intermediate in size between U. a. arctos and U. a. beringianus, with a proportionately larger skull.[15]

Ursus arctos crowtheri – Atlas bear (extinct) Habit while still extant was the Atlas Mountains and adjacent areas in North Africa, from Morocco to Libya. Last surviving bear is thought to have been killed by hunters in the 1870s.


Ursus arctos dalli
Ursus arctos gyas – Peninsular brown bear Coastal Alaska


Ursus arctos horribilis – Grizzly bear Western Canada, Alaska, and the northwestern United States, historically existed in Great Plains Grizzlies are identified by a medium to dark brown coat with gray, or "grizzled" tips on the fur. Smaller than the coastal bear, a large male grizzly can weigh up to 364 kilograms (800 lb) in inland areas, with bears in the Yukon region weighing as little as 80 kg (180 lb). Coastal bears may be nearly twice a mountain grizzly's weight. Highly adaptable: can live in montane pine forests, temperate rainforest, arid scrubland, and prairie.

Ursus arctos isabellinus – Himalayan brown bear Nepal, Pakistan, and Northern India Having a reddish-brown or sandy coat color, this bear is smaller than most other brown bears found on the Asian continent.

Ursus arctos lasiotus – Ussuri brown bear (or Amur brown bear, black grizzly or horse bear) Russia: Southern Kuril Islands, Sakhalin, Maritime territory, and the Ussuri/Amur river region south of the Stanovoy Range, China: Heilongjiang, Japan: Hokkaidō[15] This bear is thought to be the ancestor of U. a. horribilis.[10]

Ursus arctos middendorffi – Kodiak bear Kodiak, Afognak, Shuyak Islands (Alaska) This is the largest subspecies of brown bear, with other coastal brown bears potentially reaching nearly as large.
Ursus arctos nelsoni – Mexican grizzly bear (extinct) Formerly northern Mexico, including Chihuahua, Coahuila, and Sonora, southwestern United States including southern ranges of Texas, Arizona, and New Mexico This bear is believed extinct due to cattle ranching in both the United States and Mexico. Distinct in its ability to survive arid conditions, it could live in both montane pine forests of Mexico and canyonlands of Sonoran Desert.

Ursus arctos pruinosus – Tibetan blue bear Tibetan plateau [15] This is a moderately sized subspecies with long and shaggy fur. Both dark and light variants are encountered, with intermediate colors predominating. The fur around the neck is light, and forms a "collar". The skull is distinguished its relatively flattened choanae, an arch-like curve of the molar row and large teeth.[15]
Ursus arctos sitkensis Baranof Island Appearing to be more closely related to the polar bear than to other brown bears,[13] this species is called "clade I" by Waits, and others, and is part of the subspecies identified as U. a. sitkensis, by Hall and as U. a. dalli by Kurtén.

Ursus arctos stikeenensis

Ursus arctos syriacus – Syrian brown bear Found in the trans-Caucasus, Syria, Iraq,Turkey (Asia Minor), Iran, Afghanistan, Pakistan, western Himalayas and the Pamir-Alai and Tien Shan mountains,[15] probable historical presence in Israel The Syrian is a light colored, moderate to small-sized subspecies with light claws.[15] Recently, however, it was shown that this form, at least matrilineally, is not monophyletic and belongs to Ursus arctos arctos[17]

Ursus arctos marsicanus – Marsican brown bear (not officially recognised) Marsica, central Italy There are an estimated 30 to 40 bears remaining in the Marsica area.

Hybrids

I always wondered what a hippo looked like in its previous land based life. They are now a "facultative" riverine animal tat may become a full time riverine animal.

Anthracotheriidae is a family of extinct, hippopotamus-like artiodactyl ungulates related to hippopotamuses and whales. The oldest genus, Elomeryx, first appeared during the Middle Eocene in Asia. They thrived in Africa and Eurasia, with a few species ultimately entering North America during the Oligocene. They died out in Europe and Africa during the Miocene, possibly due to a combination of climatic changes and competition with other artiodactyls, including pigs and true hippopotami.[3] The youngest genus, Merycopotamus, died out in Asia during the late Pliocene. The family is named after the first genus discovered, Anthracotherium, which means "coal beast," as the first fossils of it were found in Paleogene-aged coal beds in France. Fossil remains of the anthracothere genus were discovered by the Harvard University and Geological Survey of Pakistan joint research project (Y-GSP) in the well-dated Middle and Late Miocene deposits of the Pothohar Plateau in northern Pakistan.[4]
In life, the average anthracothere would have resembled a skinny hippopotamus with a comparatively small, narrow head and most likely pig-like in general appearance.[5] They had four or five toes on each foot, and broad feet suited to walking on soft mud. They had a full set of approximately 44 teeth with five semi-crescentric cusps on the upper molars,[3] which, in some species, were adapted for digging up the roots of aquatic plants.[6]

One of the reasons i think it is a mistake to attempt to intervene is that it's not just a case of feeding the polar bears--when their environment changes, it changes for every other species who live there, too.