Which will have the most impact?

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Solar Farms

Electricity Generation

Solar farms tap the sun's virtually unlimited, clean, and free fuel, using large-scale arrays of hundreds, thousands, or in some cases millions of photovoltaic panels.

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Rank and results by 2050 #8

Solar Farms

Reduced CO2: 37 gigatons
Net cost (Billions US$): $-80.60
Net operational savings: $5,023.84 billion
What do these numbers mean?

TOTAL CO2-EQ REDUCTION (GT)

Total CO2-equivalent reduction in atmospheric greenhouse gases by 2050 (gigatons)

NET COST (billions US $)

Net cost to implement

SAVINGS (billions US $)

Net savings by 2050

Impact:

Currently .4 percent of global electricity generation, utility-scale solar PV grows to 10 percent in our analysis. We assume an implementation cost of $1,445 per kilowatt and a learning rate of 19.2 percent, resulting in implementation savings of $81 billion when compared to fossil fuel plants. That increase could avoid 36.9 gigatons of carbon dioxide emissions, while saving $5 trillion in operational costs by 2050—the financial impact of producing energy without fuel.

Vs

LED Lighting (Commercial)

Buildings and Cities

Lighting accounts for 15 percent of global electricity use. LEDs (light emitting diodes) require less energy and create less waste heat than other bulbs.

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Rank and results by 2050 #44

LED Lighting (Commercial)

Reduced CO2: 5 gigatons
Net cost (Billions US$): $-205.05
Net operational savings: $1,089.63 billion
What do these numbers mean?

TOTAL CO2-EQ REDUCTION (GT)

Total CO2-equivalent reduction in atmospheric greenhouse gases by 2050 (gigatons)

NET COST (billions US $)

Net cost to implement

SAVINGS (billions US $)

Net savings by 2050

Impact:

Our analysis assumes that LEDs will become ubiquitous by 2050, encompassing 82 percent of commercial lighting. As LEDs replace less-efficient lighting, 5.0 gigatons of carbon dioxide emissions could be avoided in commercial buildings.

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