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Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products.Fire is hot because the conversion of the weak double bond in molecular oxygen, O2, to the stronger bonds in the combustion products carbon dioxide and water releases energy (418 kJ per 32 g of O2); the bond energies of the fuel play only a minor role here.At a certain point in the combustion reaction, called the ignition point, flames are produced. The flame is the visible portion of the fire. Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma.Depending on the substances alight, and any impurities outside, the color of the flame and the fire's intensity will be different.
Fire in its most common form can result in conflagration, which has the potential to cause physical damage through burning. Fire is an important process that affects ecological systems around the globe. The positive effects of fire include stimulating growth and maintaining various ecological systems. Its negative effects include hazard to life and property, atmospheric pollution, and water contamination.If fire removes protective vegetation, heavy rainfall may lead to an increase in soil erosion by water.Also, when vegetation is burned, the nitrogen it contains is released into the atmosphere, unlike elements such as potassium and phosphorus which remain in the ash and are quickly recycled into the soil. This loss of nitrogen caused by a fire produces a long-term reduction in the fertility of the soil, but this fecundity can potentially be recovered as molecular nitrogen in the atmosphere is 'fixed' and converted to ammonia by natural phenomena such as lightning and by leguminous plants that are 'nitrogen-fixing' such as clover, peas, and green beans.
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Fire has been used by humans in rituals, in agriculture for clearing land, for cooking, generating heat and light, for signaling, propulsion purposes, smelting, forging, incineration of waste, cremation, and as a weapon or mode of destruction.
Looking for how to create desktop slideshow in Ubuntu 18.04? Here I'll show you some best wallpaper changing software for Ubuntu Linux.
1. Shotwell
For just the basic automatic wallpaper changing feature, you don't need to install any software.
Just launch the pre-installed Shotwell photo manager, choose the pictures you need (you may need to import them first), then go to Files -> Set as Desktop Slideshow.
Finally set the time interval in next dialog and done!
2. Wallch
Wallch was my favorite wallpaper changing software though it's not under active development. Besides changing local wallpapers, Wallch also features:
- Display live earth as desktop background.
- Download and display picture of the day (wikipedia).
- Wallpaper clocks
- Live website as desktop background.
Wallch can be easily installed in Ubuntu Software:
3. Variety
Variety is an open-source wallpaper changer that use local images or automatically download wallpapers from Unsplash and other online sources, allows you to rotate them on a regular interval, and provides easy ways to separate the great images from the junk. Variety can also display wise and funny quotations or a nice digital clock on the desktop.
Variety can be easily installed in Ubuntu Software. For the latest release, go to Variety website.
4. Wallpaper Downloader
This is a wallpaper downloading software that automatically downloads pictures from Devianart, Bing daily wallpaper, Wallhaven.cc, etc., with given keywords, resolution, time interval. And of course, it provides ability to change wallpaper every x minute.
Wallpaper Downloader can be installed easily in Ubuntu Software.
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These are the applications that I've ever used to create desktop slideshows in Ubuntu desktop.
Backgrounds 7 0 – Dynamic Desktop Wallpapers 4k Desktop
If you know any other great wallpaper changing software, feel free to tell me in the comment. Textmate 2 0 rc19.
