Robot hives in Israel kibbutz hope to keep bees buzzing

They function as normal hives, but apiaries built at a kibbutz in Israel's Galilee are decked out with high-tech artificial intelligence systems set to ensure longevity for these vital pollinators.

Energy & Green Tech

Mapping how energy flows in organic solar cells

Efficient and environmentally friendly solar cells are required for a transition to a fossil-free energy supply. Researchers at Linköping University have mapped how energy flows in organic solar cells, something that previously ...

Energy & Green Tech

Using citizen science for the advancement of solar energy

A team of researchers has used the experience of a participatory strategy to create and launch Generation Solar, a citizen science initiative for research and innovation in solar energy. Generation Solar has been coordinated ...

Energy & Green Tech

California prepares for energy shortfalls in hot, dry summer

California likely will have an energy shortfall equivalent to what it takes to power about 1.3 million homes when use is at its peak during the hot and dry summer months, state officials said Friday.

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Solar energy

Solar energy is the radiant light and heat from the Sun that has been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar radiation along with secondary solar resources such as wind and wave power, hydroelectricity and biomass account for most of the available renewable energy on Earth. Only a minuscule fraction of the available solar energy is used.

Solar power provides electrical generation by means of heat engines or photovoltaics. Once converted, its uses are limited only by human ingenuity. A partial list of solar applications includes space heating and cooling through solar architecture, potable water via distillation and disinfection, daylighting, hot water, thermal energy for cooking, and high temperature process heat for industrial purposes.

Solar technologies are broadly characterized as either passive solar or active solar depending on the way they capture, convert and distribute sunlight. Active solar techniques include the use of photovoltaic panels and solar thermal collectors (with electrical or mechanical equipment) to convert sunlight into useful outputs. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light dispersing properties, and designing spaces that naturally circulate air.

This text uses material from Wikipedia, licensed under CC BY-SA