Fighting climate change, protecting nature go hand in hand

The preservation of Earth's pristine wildernesses and oceans, long treated as a separate issue to curbing climate change, is taking on more importance as scientists say they really need to go hand in hand.

UN talks struggle to stave off climate chaos

United Nations climate negotiations in Madrid were set to wrap up on Friday with even the best-case outcome likely to fall well short of what science says is needed to avert a future ravaged by global warming.

Net zero: climate-saving target or delay tactic?

With the European Union set to decide whether to adopt a plan to green their economies and achieve net-zero emissions by 2050, how does carbon neutrality relate to the climate crisis?

Bayer targets climate-neutral business by 2030

German chemical and pharmaceutical giant Bayer said Tuesday it aims to become "climate-neutral" by 2030, slashing or compensating all of its greenhouse gas emissions.

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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