Target Prelims 2025: Day 27
1. Carbon sequestration is the long-term removal, capture, or sequestration of carbon dioxide from the atmosphere to slow or reverse atmospheric CO2 pollution and to mitigate or reverse climate change.
Carbon dioxide (CO2) is naturally captured from the atmosphere through biological, chemical, and physical processes. These changes can be accelerated through changes in land use and agricultural practices, such as converting crop and livestock grazing land into land for non-crop fast growing plants.
Artificial processes have been devised to produce similar effects including large-scale, artificial capture and sequestration of industrially produced CO2 using subsurface saline aquifers, reservoirs, ocean water, aging oil fields, or other carbon sinks, bio-energy with carbon capture and storage, biochar, ocean fertilization, enhanced weathering, and direct air capture when combined with storage.
** Ocean iron fertilization is an example of a geo-engineering technique used to sequester CO2 in oceans. Iron fertilization attempts to encourage phytoplankton growth, which removes carbon from the atmosphere for at least a period of time.
* Natural iron fertilisation events (e.g., deposition of iron-rich dust into ocean waters) can enhance carbon sequestration. Sperm whales act as agents of iron fertilisation when they transport iron from the deep ocean to the surface during prey consumption and defecation.
**Although a bamboo forest stores less total carbon than a mature forest of trees, a bamboo plantation sequesters carbon at a much faster rate than a mature forest or a tree plantation. Therefore the farming of bamboo timber may have significant carbon sequestration potential.
2. Rating system for green buildings in India:
The Indian Green Building Council (IGBC) was formed by the Confederation of Indian Industry (CII). IGBC is India's premier body for green building certification and related services.
GRIHA: Green Rating for Integrated Habitat Assessment (GRIHA) is a rating system evolved by The Energy and Resources Institute (TERI).
The Energy Conservation Building Code (ECBC) was launched in May 2007 by the Bureau of Energy Efficiency (BEE), Ministry of Power. Its main objective is to establish minimum requirements for energy efficient design and construction of buildings.
ECO-NIWAS Portal (Energy Conservation-New Indian Way for Affordable & Sustainable homes) was launched by the government to increase awareness about sustainable building and energy efficient homes in the country. It is developed by BEE.
3. A carbon offset is a reduction in emissions of carbon dioxide or other greenhouse gases made in order to compensate for emissions made elsewhere.
Offsets are measured in tonnes of carbon dioxide-equivalent. One tonne of carbon offset represents the reduction of one tonne of carbon dioxide or its equivalent in other greenhouse gases.
Carbon offsets represent multiple categories of greenhouse gases, including[16] carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), perfluorocarbons (PFCs), hydrofluorocarbons (HFCs), and sulfur hexafluoride (SF6).
Emission reduction projects reduce the amount of greenhouse gases in the atmosphere in one of three ways:
By capturing and destroying a greenhouse gas that would otherwise be emitted into the atmosphere. An example of this is a methane gas capture project at a landfill.
By producing energy using a clean, renewable resource that eliminates the need to produce that same energy from fossil fuels, the burning of which releases greenhouse gas into the atmosphere. An example of this is wind power.
By capturing and storing (or “sequestering”) greenhouse gases to prevent their release into the atmosphere. An example of this is a project that promotes the healthy growth and maintenance of forests.