Minnesota's forests, land offer chance to cut greenhouse gases
Reforestation and cover cropping should be on the front lines of Minnesota's fight to reduce greenhouse gases, and could cut up to one-fifth of the state's heat-trapping emissions.
Reforestation and cover cropping should be on the front lines of Minnesota's fight to reduce greenhouse gases, and could cut up to one-fifth of the state's heat-trapping emissions.
Environment
Jan 19, 2021
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The amount of carbon dioxide that we can still emit while limiting global warming to a given target is called the "remaining carbon budget," and it has become a powerful tool to inform climate policy goals and track progress ...
Environment
Jan 19, 2021
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Future climate change will cause a regionally uneven shifting of the tropical rain belt—a narrow band of heavy precipitation near the equator—according to researchers at the University of California, Irvine and other ...
Earth Sciences
Jan 18, 2021
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The world is falling short of promises made under the Paris climate deal to help the most vulnerable nations deal with the increasingly devastating impacts of climate change, according to the United Nations.
Environment
Jan 17, 2021
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When the Thomas Fire raged through Ventura and Santa Barbara counties in December 2017, Danielle Touma, at the time an earth science researcher at Stanford, was stunned by its severity. Burning for more than a month and scorching ...
Earth Sciences
Jan 15, 2021
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Forests and other land ecosystems today absorb 30 percent of humanity's CO2 pollution, but rapid global warming could transform these natural 'sinks' into carbon 'sources' within a few decades, opening another daunting front ...
Environment
Jan 14, 2021
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Scientists based at Rothamsted and the University of Bristol Veterinary School have found a clear link between the weight of lambs early in their life and meat quality—which is good news for consumers, farmers, and the ...
Veterinary medicine
Jan 14, 2021
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Scientists studying ocean temperature and sea level changes from thousands of years ago have said their data could be crucial to understanding climate change and improving projections of how our world may change due to global ...
Earth Sciences
Jan 14, 2021
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August 2020 set new record high sea surface temperatures (SSTs) in the northwestern Pacific Ocean and around the Japan coasts. A new study led by National Institute for Environmental Studies (NIES) researchers revealed that ...
Earth Sciences
Jan 14, 2021
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A Paris court will begin hearing Thursday a complaint brought by NGOs backed by two million citizens accusing the French state of failing to act to halt climate change.
Environment
Jan 14, 2021
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A greenhouse (also called a glasshouse) is a building in which plants are grown. These structures range in size from small sheds to very large buildings. A miniature greenhouse is known as a cold frame.
A greenhouse is a structure with different types of covering materials, such as a glass or plastic roof and frequently glass or plastic walls; it heats up because incoming visible solar radiation (for which the glass is transparent) from the sun is absorbed by plants, soil, and other things inside the building. Air warmed by the heat from hot interior surfaces is retained in the building by the roof and wall. In addition, the warmed structures and plants inside the greenhouse re-radiate some of their thermal energy in the infra-red, to which glass is partly opaque, so some of this energy is also trapped inside the glasshouse. However, this latter process is a minor player compared with the former (convective) process. Thus, the primary heating mechanism of a greenhouse is convection. This can be demonstrated by opening a small window near the roof of a greenhouse: the temperature drops considerably. This principle is the basis of the autovent automatic cooling system. Thus, the glass used for a greenhouse works as a barrier to air flow, and its effect is to trap energy within the greenhouse. The air that is warmed near the ground is prevented from rising indefinitely and flowing away.
Although there is some heat loss due to thermal conduction through the glass and other building materials, there is a net increase in energy (and therefore temperature) inside the greenhouse.
Greenhouses can be divided into glass greenhouses and plastic greenhouses. Plastics mostly used are PEfilm and multiwall sheet in PC or PMMA. Commercial glass greenhouses are often high tech production facilities for vegetables or flowers. The glass greenhouses are filled with equipment like screening installations, heating, cooling, lighting and may be automatically controlled by a computer.
This text uses material from Wikipedia, licensed under CC BY-SA