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energy efficiency

New study says solar panels have repaid their fossil fuel debt

Phys.org reports: The climate friendly electricity generated by solar panels in the past 40 years has all but cancelled out the polluting energy used to produce them, a study said Tuesday. Indeed, by some calculations, the so-called “break-even point” between dirty energy input and clean output may already have arrived, researchers in the Netherlands reported.

Is renewable energy really environmentally friendly?

Robin Delobel writes: The issue is rarely raised, but renewable energies have a heavy environmental impact when the total production chain and overall product life-cycle is taken into account– particularly, the stage of mining the metals needed in their production. In addition, chemical products used in the mining operations often lead to severe long-term pollution.

How viable (and sustainable) are solar PV systems? A debate

Post the Paris climate agreement, the world looks to solar energy more than ever to reduce carbon emissions and counter climate change, with multi-billion dollar solar programmes announced by just about every major country. But just how efficient,  and environmentally sustainable is the celebrated solar photovoltaic technology? Here’s what some leading voices have to say.