Doing more with less: The new imperative for clean energy

Every meaningful leap in energy has, at its core, been a story of efficiency. The wood fire gave way to coal not merely because coal burned hotter, but because it released more energy per unit consumed. The steam engine wasn’t just a novelty. It was a multiplier. Progress, in the energy world, has always been about learning to do more with less.

That principle is more relevant today than ever. As the clean energy transition accelerates, we are running into the natural limits of the resources we once took for granted: land and water. Utility-scale solar farms demand vast tracts of open land, roughly four to five acres per megawatt. Thermal power, for all its flaws, co-opted water bodies without much public reckoning. But now, as both land and freshwater come under increasing pressure from urbanisation, from agriculture, from climate stress itself, the energy transition is being asked a harder question: Can you scale without consuming?

The answer, increasingly, is yes. But it requires us to think differently about what a power plant looks like.

Consider the emergence of floating solar. On the surface, it appears to be a simple engineering adaptation. Move the panels from ground to water. But the implications run deeper. India alone has over 18,000 reservoirs, irrigation tanks, and hydroelectric catchments that sit largely idle in terms of energy generation. They are, in effect, underutilised surfaces. Floating solar transforms, them into dual-purpose infrastructure: water bodies that generate electricity while simultaneously reducing evaporation by up to 70%, preserving freshwater for agriculture and consumption. In a country that holds just 4% of the world’s freshwater while supporting 18% of its population, that is not a footnote. It is a strategic imperative.

There is an efficiency dividend here too. Floating panels consistently outperform their ground-mounted counterparts by 5 to 15%, thanks to the natural cooling effect of the water beneath them. Combined with India’s average solar irradiance of 4 to 7 kilowatt-hours per square metre per day, among the highest in the world, the productivity case is as strong as the conservation one.

Globally, this is no longer a fringe concept. Cumulative installed capacity has crossed 5 GW, with rapid deployments across Asia, Europe, and increasingly, South Asia. In the context of India’s ambition to reach 500 GW of renewable energy by 2030, a target where land availability is already a known bottleneck, floating solar is not a niche workaround. It is a scalable, replicable model that resolves a land conflict before it becomes a crisis.

This is what resource-aware energy infrastructure looks like. It does not ask communities to choose between food and power, between water and watts. It finds the overlap.

Earth Day is often marked with pledges and projections, targets for emissions reductions, commitments to renewable capacity, promises of a net-zero future. These are necessary. But targets without method are just arithmetic. What Earth Day should also prompt us to consider is the how: the underlying logic of how we build, where we build, and what we ask of the planet in doing so.

The clean energy transition carries a real risk of replicating the extractive habits of the fossil fuel era, just with different inputs. Land grabs for solar. Rare earth mining for batteries. Water consumption for green hydrogen. None of these are arguments against the transition. They are arguments for doing it intelligently.

Floating solar is one example of that intelligence made practical. It will not solve everything. But it represents a design philosophy, resource-aware, conflict-minimising, long-horizon thinking, that should permeate every decision we make as we scale clean energy.

The path forward is not just cleaner. It must also be smarter.

Popular content

Sterling and Wilson Renewable Energy Ltd reports INR 7,548 crore revenue in FY2026

23 April 2026 Sterling and Wilson Renewable Energy Ltd (SWREL) has reported consolidated revenue from operations of INR 7,548 crore for FY2026, its highest since li...