Land Use, Land-Use Change and Forestry

Planting and reforestation all mean establishing trees on non-trees. Planting means establishing forests in the land covered with trees recently, planting stands for land without forests. Different definitions distinguish between the two processes. Some of the definitions of afforestation are based on expressions such as "there is no forest support in a historical period", others refer to a specific year, or other processes such as "current climatic conditions" There is also one that points to. "IPCC Guidelines" defines tree planting as "planting new forests on land that does not contain historic forests".

For example, there is a definition that emphasizes changes in designation of land cover and land use (Helms, 1998), such as "Establish forests and forests in areas where vegetation and land use are not forests". See below)

If the definitions of afforestation and reforestation are similar - only when the land is not planted - the actual time interval between them is not important. In Article 3, treating tree planting activities and afforestation activities in exactly the same way. However, other problems may affect the application of these terms. These problems are related to the sequence of human activity and the actual establishment pattern before the new tree. These issues are discussed in Section 2.3.2. However, if these two actions are treated equally in accounting, it is important that their precise distinction is not important to the implementation of the protocol.

Note: There is considerable uncertainty about land use, changes in land use and current emissions of forestry (LULUCF). For example, according to the IPCC's Fifth Assessment Report, land use, land use change and forestry emissions in 2010 are 540 million tons of carbon dioxide, the 2010 Food and Agriculture Organization (FAO) emissions The amount was 240 million tons. Regarding the current land use, land use change, forest emissions assessment, the analysis of the World Economic Cooperation Program combines the following data. FAO estimates that it released 100 million tons of carbon dioxide in 2010. The non-energy related greenhouse gas emissions other than CO 2 are evaluated by the OECD ENV - Linkages model and the US Environmental Protection Agency (US EPA) on national information sources (if present) and fluorinated gas (F gas) The data is updated. )

In the United States, carbon dioxide emissions in the atmosphere have exceeded emissions since 1990 due to land use, land use change and forestry (LULUCF) activities. Therefore, during this time, the US land use, land use change, and the forestry sector are not considered sources of carbon dioxide, but are regarded as a net absorption source of carbon dioxide. In many parts of the world, especially in countries where a wide range of forest areas have been cut down, the opposite is true, often due to agricultural purposes and conversion to villages. In such a case, land use, changes in land use, and the forestry sector could be a net source of greenhouse gas emissions.

Land use and forestry (15% off greenhouse gas emissions in 2010) - Land area can be used as sink (absorbing carbon dioxide from the atmosphere) or as a source of greenhouse gas emissions. Since 1990, carbon dioxide in the atmosphere has been absorbed more than atmospheric carbon dioxide than in emissions by the management of forests and other lands in the United States. Nuclear power is an important part of a clean energy strategy. Electricity generated at nuclear power plants does not emit carbon dioxide, so we can reduce emissions more than 2 billion tons annually. Other nuclear technologies that can be used to reduce greenhouse gases include electric vehicles and hybrid vehicles, water core desalination (refining), the use of hydrogen as a tar in the production of fuels from crude oil is petroleum It is increasingly being used as a source. Nuclear energy can also be used for electrolysis to produce hydrogen, which contributes to the hydrogen economy. In the future, high temperature reactors may be used to make it.