Switch off what you're not using.
Turn off lights, fans, screens, and chargers when you leave - the cheapest, cleanest unit of power is the one nobody had to make.
The fan cooling an empty room is just spinning for the walls.
Here's the science
- What happensLeaving lights and appliances on when no one needs them
- HowIdle devices still pull power, adding to the demand the grid has to generate
- SoWasted electricity and a higher bill - avoidable by the simple habit of switching off
How it works - the size isn't measured hereGLOBAL
“The simplest and easiest way to save energy is to turn lights off when you leave a room.”
Source: Energy efficiency and demand - International Energy Agency (IEA)(checked 2026-07-18)
- What happensMore electricity demand than we actually need
- HowMost of India's power still comes from burning coal, so extra demand is met largely by running more coal plants - which emit CO2 and drink cooling water
- SoAvoidable coal burning; each unit saved cuts emissions and water use
How it works - the size isn't measured hereIN
“Coal power generation – which makes up nearly three-quarters of coal demand in India – grew by 5% in 2024 mirroring growth in electricity demand.”
IEA notes coal is about three-quarters of India's coal demand and grew with electricity demand; treated here as a mechanism, not a precise generation share.
Source: Global Energy Review 2025 - Coal - International Energy Agency (IEA)(checked 2026-07-18)
And when we do it
Switch off what's idle and total demand drops, so fewer coal units run - less CO2, less cooling water burned, and a smaller bill.
You couldn't have known. Now you do.