What Makes a City Sustainable? An Evidence-Based Analysis
A sustainable city integrates compact urban form, efficient transport, renewable energy, green infrastructure, and inclusive governance to reduce environmental impact and improve quality of…
Topic archive
Solutions & Transitions
Guides and insights on moving toward a sustainable, low‑carbon future.
Small Modular Reactors: Potential and Uncertainty
Small modular reactors (SMRs) are nuclear fission reactors with a power capacity typically under 300 MWe, designed for factory fabrication and modular deployment. They…
Urban Trees: Cooling Benefits and Water Trade-Offs
Urban trees mitigate heat islands through shading and evapotranspiration, but require significant water, especially in dry climates. The solution is promising yet context-dependent, demanding…
Operational Carbon vs Embodied Carbon: Understanding the Full Lifecycle Emissions of Buildings
Operational carbon refers to greenhouse gas emissions from a building's energy use during its lifetime, while embodied carbon is the emissions from manufacturing, transporting,…
Science-Based Targets Explained
Science-based targets are corporate greenhouse gas reduction goals aligned with the level of decarbonization required to meet the Paris Agreement’s aim of limiting global…
Capacity Factor vs Efficiency: Understanding the Difference
Capacity factor measures how much energy a power plant actually produces over time compared to its maximum potential output, while efficiency measures how well…
Can Recycling Keep Up With Growing Material Demand?
Recycling alone cannot fully meet the growing global demand for materials due to fundamental physical and economic limitations. While it reduces the need for…
Why Vehicle Size Matters for Environmental Impact
Reducing vehicle size is a proven, low-cost strategy to cut greenhouse gas emissions, air pollution, and resource consumption. Larger vehicles consume more energy and…
Levelized Cost vs Total System Cost: Understanding the Difference
Levelized cost of energy (LCOE) measures the average lifetime cost per unit of electricity from a specific power plant, while total system cost captures…
District Heating and Cooling: A Comprehensive Analysis
District heating and cooling (DHC) systems distribute thermal energy from centralized sources to multiple buildings, offering a potentially efficient and low-carbon solution for space…