Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.
It is an important source of renewable energy and its technologies are broadly characterized as either passive solar or active solar depending on how they capture and distribute solar energy or convert it into solar power. Active solar techniques include the use of photovoltaic systems, concentrated solar power and solar water heating to harness the energy. 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.
life on our planet evolved and has been sustained by transforming energy directly from the sun into bio metabolic energy that fuels organisms.. a crucial element in how life has been sustained is that the energy source, namely the sun, was external, reliable, and relatively constant.. this ongoing, ever evolving quasi steady state very slowly began to change w our discover of fire, which is the chemical process that releases the sun’s energy stored in dead wood.. when coupled w the invention of agri, this began the transition to the anthropocene .. as we emerged from a purely bio organism to present state as urbanize socioeconomic creature no longer in meta equilibrium w the ‘natural’ world.. this all in the last 200 yrs when our discovery and exploitation of the sun’s energy stored underground in coal and oil heralded the beginning of the urbanocence.. fossil fuels were, and still are, perceived like the sun itself as an almost limitless source of energy whose subsequent release sparked the industrial revolution
from a sci perspective the truly revolutionary character of the industrial rev was the dramatic change from an open system where energy is supplied externally by the sun to a closed system where energy is supplied internally by fossil fuel.. this is a fundamental systemic change w huge thermodynamic consequences.. because in a closed system the 2nd law of therm and it s requirement that entropy increases strictly applies..we ‘progressed’ from an external, reliable, and constant source of energy to one that is internal, unreliable and variable..
huge.. this is huge.. where we went from open to closed
regardless of whether one believes in the innovative capacity of human beings to solve the problems of nuclear energy…. apart from its many other issues, the nuclear option, like that of traditional fossil fuels, keeps us trapped in the paradigm of a closed system, whereas ..
the solar option has the critical capacity for potentially returning us to a truly sustainable paradigm of an open system..t
huge – solar energy
World Economic Forum (@wef) tweeted at 5:22 AM – 21 Feb 2018 :
Why we should invest in natural resources to build a sustainable future https://t.co/3jY03v03I2 #environment https://t.co/jgrSYbMd5Y (http://twitter.com/wef/status/966286913714958338?s=17)
Christopher Bishop (@chrisbishop) tweeted at 5:52 PM – 21 Feb 2018 :
India unveils robot maintained solar power plant+ it’s huge https://t.co/AfUA8zae92 via @DigitalTrends (http://twitter.com/chrisbishop/status/966475743491428352?s=17)