What Is Renewable Energy?

Renewable energy

Renewable energy refers to sources of power which do not deplete or diminish naturally over time, including solar, wind and hydroelectricity.

Renewable energy requires harnessing natural resources more efficiently. To achieve this goal, more sustainable methods of energy production must be found, along with improved power storage facilities and management strategies.

Renewable Energy Sources

Renewable energy refers to natural, replenishable sources such as sunlight, wind, falling water, sustainable biomass and energy from waste that never run out and can be replenished via processes like natural regenerative cycles, geothermal heat or wave motion. These resources cannot be exhausted but instead continually replenish themselves through processes like natural regenerative cycles, geothermal heat or wave motion.

Some sources emit zero greenhouse gas emissions during their operation; wind, solar and water power generation emit no emissions whatsoever, while low emission geothermal is relatively neutral or neutral biomass sources have neutral impacts; their individual impact depends on various factors.

Variable renewables such as wind and solar power can be combined with energy storage to reduce uncertainty associated with renewable electricity production, making the technology particularly advantageous in areas with limited or no solar or wind resources. Energy storage helps store excess electricity generated during high production periods (sunny days or high wind speeds for solar, or when high wind speeds arrive for wind). Later when demand spikes again it can be released when needed – helping ensure peak demand doesn’t spike unexpectedly! It is particularly advantageous when used alongside renewable power as this enables electricity storage to reduce uncertainties associated with electricity produced from renewable sources and help ensure peak demand meets or surpassing expectations when higher demand. This technique reduces uncertainties associated with electricity generated from renewable sources and is particularly helpful for systems operating in regions with relatively little or no available solar or wind power available or for systems operating with limited or no renewable sources of power available solar or wind resources available such as areas that rely heavily upon renewable energy such as that of being charged via batteries to save batteries is stored until needed later when needed for use during times when demand exceeds expectations or when supplies run low or no available solar or wind generation occurs when needed to use later at higher demand when higher demand occurs later when needed for use during times when renewable generation takes place later when needed and reduced uncertainties associated with electricity generated from renewable sources while increasing reliability when operating systems operating within areas with limited or no renewable source available solar or wind generation capabilities available renewable energy production available, in areas without sufficient solar or wind generation capacity available such systems operating when required from renewable generation such systems with minimal or zero available renewable production is used at later time for later use at later demand when generated when higher demand rises when high generation occurs later due to limited or no availability exists (ie for wind generation occur later.) In terms of demand for example from production by higher demand is needed later, or no available for future demand increase (ie demand increases in terms of greater demand increases demand on higher demand but less production, such as solar/wind production but no availability exists due to available renewable resources than anticipated such energy source availability e a lot available generating capabilities when this way than its expected output from sources or no available energy, such system operating.

Renewable power can contribute to local economies in regions lacking natural resources while simultaneously decreasing dependence on imported fossil fuels that may exacerbate balance-of-payment issues. Furthermore, building and operating renewable facilities can increase their value relative to indigenous resources.


Biomass energy sources provide an earth-friendly energy alternative that can replace fossil fuels. Biomass can be used for electricity generation or directly heating homes; additionally, its production produces biofuels that can be used as transportation fuel.

Biofuels can be produced from various resources, including plants, crops, landfill gas and municipal solid waste. Wood from forests or logging residues is usually the main biomass source.

However, other sources of biomass that can produce renewable energy on an industrial scale include byproducts from sawmills, paper mills and landfills.

These byproducts can then be converted to fuel and energy via gasification, a process where feedstock (usually MSW) is heated to over 700C (1300F) with controlled oxygen, until molecules break down to form syngas and slag.

Biomass can not only produce energy, but can also be utilized to mitigate greenhouse gas emissions. If the source is managed sustainably, biomass can actually help absorb carbon from the atmosphere as it grows back into itself.

Biomass is an efficient and renewable source of energy that can diversify energy supplies, reduce emissions and create growth and jobs. Furthermore, biomass can also help balance out variable renewable energy supplies.


Geothermal energy is a sustainable resource that taps into the hot rock and water below Earth’s surface for clean electricity generation and heating of buildings.

Heat pumps can be used both for heating and cooling needs, and can even help mitigate climate change. Their advantages include being baseload renewable sources – meaning that they work regardless of weather conditions in winter or summer!

However, it’s essential to recognize that geothermal resources may be at risk from earthquakes. Even micro-earthquakes that don’t register can shut down geothermal sites completely as was witnessed in Larderello, Italy where geothermal steam powered the world’s first electricity plant.

Re-injection of heat back into underground reservoirs is usually sufficient to overcome this type of issue, serving to both recharge them as well as prevent micro-earthquakes that could otherwise damage facilities or threaten lives.

Geothermal energy may still represent only a relatively minor portion of renewable energy capacity worldwide, yet recent innovations in oil and gas technologies are speeding its progress, and with adequate policy support it may quickly become a significant player in renewable energy space – offering both environmental benefits as well as more job opportunities than any other green source.


Hydroelectric power harnessing the force of flowing water is one of the world’s primary renewable energy sources and largest emissions-free electricity generator. Hydropower accounts for 16 percent of worldwide electricity generation – second only to fossil fuels.

Hydropower can provide an additional source of clean power when other sources such as wind or solar are unavailable, or when demand changes quickly enough to require extra electricity generation. As it can quickly increase or decrease in response to fluctuations in demand, hydropower makes an ideal way of meeting intermittent electricity requirements.

Hydropower remains an integral form of renewable energy, yet production has decreased as other forms of electricity gained traction in recent years. This trend can especially be observed in Western states like Colorado where drought conditions have caused reservoirs like Lake Powell to produce less electricity than before.

Small hydropower stations with existing water flows and infrastructure present another avenue for harnessing the energy contained within flowing water, whether run-of-river or pumped-storage projects are used for their conversion into energy.

Pumped hydroelectric storage is an advanced and effective form of energy storage, working by pumping water from lower altitude reservoirs into higher reservoirs in order to exploit gravitational potential energy in water, then using that energy for driving hydraulic turbines coupled with electric generators.


Wind is the energy produced when air moves, which can be harnessed to produce electricity. Wind turbines take advantage of this renewable source of power by collecting part of this kinetic energy and converting it to rotational energy that’s then transferred over to generators that converts it to electrical current.

Wind turbines typically are situated in areas where wind conditions are more predictable.

Wind energy has quickly become the leading renewable power source. Rising concerns over petroleum costs and carbon emissions has lead to an explosion of its use worldwide.

As demand for electricity continues to increase, wind industry analysts anticipate its expansion even further. Global installed capacity should more than quadruple by 2050 according to these predictions.

Wind energy boasts several distinct advantages over other forms of renewable energy, including its lower costs and the ability to produce electricity on a local scale. Furthermore, its reduced water usage makes this form of renewable energy particularly attractive as water resources become ever scarcer.

Wind technology is also environmentally-friendly, as it does not release any toxic substances or contaminants into the atmosphere like coal and nuclear plants do. Therefore, wind does not contribute to air pollution as much.


Solar energy is an abundant, renewable resource that can be harnessed using various methods. Photovoltaic cells, concentrating solar thermal systems and other technologies exist specifically to collect sunlight and convert it to usable energy sources.

Photovoltaics are the primary means of harvesting solar energy, which is then transformed into electricity through photovoltaic conversion (PVC). PV systems consist of many individual photovoltaic cells which absorb light from the sun before ionizing electrons released by their production that interact to form an electric current between themselves and create an electric current flow.

Concentrating solar-thermal (CSP) systems offer another form of solar energy collection. CSP systems utilize mirrors to capture and direct solar radiation onto receivers that store it as heat in thermal storage systems, harnessing its energy for large scale power generation.

CSP technology utilizes solar heat for heating and cooling applications or to produce large scale electricity generation in utility solar installations. While PV primarily harnesses its direct irradiation of sunlight to generate power, CSP systems capture this heat instead and channel it through molten salt-based fluid to transfer its warmth directly.

Solar power has long been a favorite choice of American homeowners and business owners looking to reduce energy bills while simultaneously decreasing their carbon footprint. But before making a commitment, it is crucial to understand all available solar options, their respective pros and cons before making an informed decision about adopting one.