2. Mountain - a form of relief, raised above the plains with height difference (from a few meters to several kilometers).

3. Andes - the longest (9000 km) and one of the highest mountain systems of the Earth. In some places the width of the Andes is more than 500 km. The average height is about 4000 m. Andes

4. Himalayas - the highest mountain system of the Earth. Himalayan mountain system is over 2400 km in length and 350 km in width. The average height is about 6000 m. The most beautiful mountain in the world is Ama Dablam. Himalayas

5. Cordilleras are covered with modern glaciers. They are also famous for not only the picturesque Alpine landscapes, but also the ancient and modern volcanism. Cordilleras

6. Alps mountain system is located in several European countries - France, Germany, Switzerland, Austria, Italy and Slovenia. Here are the highest peaks of Europe: Mont Blanc (4807 m), Monte Rosa (4634 m), Matterhorn (4,477 m). Alps

7. Name height in meters Location Elbrus 5642 Caucasus Dyhtau 5204 Caucasus Pushkin Peak 5108 Caucasus Kazbek 5033 Caucasus Gestola 4859 Caucasus Shota Rustaveli Peak 4859 Caucasus Jimar 4780 Caucasus Uilpata 4646 Caucasus Sauhoh 4636 Caucasus Kukurtlu 4624 Caucasus Belukha 4506 Altai Munch-Syrdyk 3491 East Sayan Kyzyl Taiga 3122 West Sayan Victory 3003 Ridge Chersky Ice 2453 Koryak Highlands Tardoki Yangi2090 Sikhote-Alin mountain range People's 1895 Ural Yamanatau 1640 Ural The highest Russian mountains

8. We can already feel the effects of the invasion of human ecology in the mountains. Lack of water, landslides, floods - just a few of them.

9. Governments have already started doing something about it. In some places, they are planting forests. To save a picturesque location and area of distribution of endangered species, they make national parks and reserves.