Clean & Safe Energy
Decisions about energy — at the individual, organizational, and policy level — are among the most consequential we make. Understanding the landscape of clean energy enables better choices at every level.
Why energy decisions matter
Section titled “Why energy decisions matter”Energy production is the largest single driver of greenhouse gas emissions globally. Transitioning to clean energy sources is therefore central to addressing climate change — but it also has direct implications for air quality, energy security, cost, and long-term sustainability.
Key clean energy sources
Section titled “Key clean energy sources”Solar photovoltaic (PV) technology converts sunlight directly into electricity. Costs have fallen dramatically over the past decade, making solar one of the cheapest sources of new electricity generation in most of the world.
- Advantages: Zero emissions in operation, declining cost, scalable from rooftop to utility-scale, long lifespan.
- Challenges: Intermittent (dependent on sunlight), requires storage or grid backup, land use at scale.
Wind turbines convert kinetic energy from wind into electricity. Onshore wind is among the cheapest electricity sources available; offshore wind is more expensive but has higher and more consistent output.
- Advantages: Zero emissions in operation, increasingly cost-competitive, long lifespan.
- Challenges: Intermittent, visual and noise impact, wildlife considerations (especially birds and bats).
Hydropower
Section titled “Hydropower”Hydropower uses the movement of water to generate electricity. It is the largest source of renewable electricity globally.
- Advantages: Reliable, controllable output, long lifespan, can provide grid stability.
- Challenges: Large dams have significant ecological and social impacts; limited new sites in many regions.
Nuclear
Section titled “Nuclear”Nuclear power generates electricity through fission reactions. It produces very low lifecycle greenhouse gas emissions and provides reliable, controllable output.
- Advantages: Very low emissions, high energy density, reliable baseload power.
- Challenges: High capital cost, waste management, public perception, long construction timelines.
Individual and organizational energy decisions
Section titled “Individual and organizational energy decisions”At the individual level
Section titled “At the individual level”- Switch to a renewable electricity tariff if available in your area.
- Consider rooftop solar if you own your home.
- Reduce energy consumption through insulation, efficient appliances, and behavioral changes.
- Choose electric vehicles over fossil fuel equivalents where feasible.
At the organizational level
Section titled “At the organizational level”- Audit energy consumption and identify the largest sources.
- Set targets for renewable energy procurement (Power Purchase Agreements, on-site generation).
- Reduce consumption through efficiency measures — often the cheapest “energy source.”
- Report on energy use and progress toward targets.
The transition ahead
Section titled “The transition ahead”The global energy transition is underway but will require sustained effort, investment, and policy support. Understanding the options and trade-offs enables more informed decisions — whether as a voter, a consumer, an investor, or an organizational leader.