Top 10 ecology facts

Black. Owl's eye colour depends on the time of day in which they hunt. The ones that hunt during daylight have yellow eyes. The ones that hunt at night but also at the evenings and mornings have orange eyes. Black eyes are typical to owls that hunt only at night.

Ecological cataclysm in the USA . Dust Bowl is the period (1931-1938), in which nineteen states in the area of the Great Plains in the United States were affected by ecological catastrophe resulting from drought and severe soil erosion. This facilitated the formation of anhydrous dust storms called "dusterami". By 1934, more than 100 million hectares had lost the top, fertile soil layer.

It increases UV radiation. In the ozone layer, ozone molecules absorb UV-B and UV-C radiation - short wavelength forms of ultraviolet that can disrupt organic molecules, producing cancerous changes in living cells.

Spitsbergen permafrost. The Svalbrad Global Seed Vault (norw. Svalbrad globale frøhvelv) is located Svalbrad archipelago, at the Sptisbergen Island in Norway. It has been built to safely store seeds of edible plants from all over the world in case of any cataclism. Vault located is in the tunnel digged in the permafrost. Currently over 1.5 mln specimens are stored

Red-backed shrike hunts for its food on the ground. It eats smaller prey right away, but bigger ones like rodents and insects are kept for later, impaled on trees and bushes.

Owls don't build nest . Owls don't build their nests, they just find a nesting place and adjust it to their needs. Some of them use abandoned nests after other species.

Sulfuric acid. The most important gas which leads to acidification is sulfur dioxide, coming from fossil fuel combustion and industry (and, in lesser amounts, from volcanoes and wildfires). In recent years, emissions of nitrogen oxides which are oxidized to form nitric acid are of increasing importance due to stricter controls on emissions of sulfur containing compounds.

To protect from acid rains. The eastern third of the United States is significantly impacted by acid rain. Acids in the rain react with the calcium compounds in the stones like limestone or marble to create gypsum, which then flakes off.

In Greenland. Northeast Greenland National Park is the largest protected land area in the world. Established in 1974 and expanded to its present size in 1988, it protects 972,001 km2 and is bigger than all but twenty-nine countries in the world.

France. Low carbon dioxide emission in France is a result of large investments in nuclear technology. Most electricity produced by France is generated by 59 nuclear power plants. As a side-effect renewable energies are having difficulty taking off.