Вопрос № 1056229 - Экология

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Planted forests
1. Planted forests worldwide are increasingly important sources for forest products produced within sustainable, energy-efficient and environmentally friendly contexts. They also play a major role in preserving the social and cultural values attached to forests, particularly as natural forests decrease in size through deforestation (mainly in developing countries in the tropics and subtropics) or are designated for conservation or other purposes (mainly in developed countries in temperate zones).
2. Recently there have been concerted efforts to harmonize forest-related terms and definitions. At this point in time, it can be agreed that "planted forests" are forests in which trees have been established through planting or seeding by human intervention. Planted forests are increasingly being recognized as including semi-natural forests with indigenous species and plantation forests with exotic species.
3. Planted forests are often intensively managed for production purposes, but they may also be established for purposes of protection or conservation, or for socio-economic reasons, in which case management may be less obvious or intensive. The distinction is important for global assessments that attempt to capture the extent of productive, protective, conservational or socio-economic functions of forests, which are key criteria for sustainable forest management.
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What forests can be referred to planted forests nowadays?

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Planted forests
1. Planted forests worldwide are increasingly important sources for forest products produced within sustainable, energy-efficient and environmentally friendly contexts. They also play a major role in preserving the social and cultural values attached to forests, particularly as natural forests decrease in size through deforestation (mainly in developing countries in the tropics and subtropics) or are designated for conservation or other purposes (mainly in developed countries in temperate zones).
2. Recently there have been concerted efforts to harmonize forest-related terms and definitions. At this point in time, it can be agreed that "planted forests" are forests in which trees have been established through planting or seeding by human intervention. Planted forests are increasingly being recognized as including semi-natural forests with indigenous species and plantation forests with exotic species.
3. Planted forests are often intensively managed for production purposes, but they may also be established for purposes of protection or conservation, or for socio-economic reasons, in which case management may be less obvious or intensive. The distinction is important for global assessments that attempt to capture the extent of productive, protective, conservational or socio-economic functions of forests, which are key criteria for sustainable forest management.
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Match the dates and the events
1. United Nations Conference on the Human Environment in Stockholm.
2. World Charter for Nature adopted by United Nations member nation-states.
3. United Nations Conference on Environment and Development in Rio de Janerio.

Set up a correspondence between atmosphere constituent gasses and digital indicators of their concentrations
1. Oxygen
2. Carbon
3. Nitrogen  

The noise level produced by a bus moving down the street is 90 dB. The sanitary-hygienic standard of the noise level is 40 dB, thus the noise produced by a bus exceeds it by _______ times. (Give your answer as a whole number.)

In the food web you see in the picture ______ and ______ act as both a predator and a prey at the same time.