
When thermal power plants burn coal to generate electricity, sulphur mixes with oxygen to release sulphur dioxide – or SO2 – in the air. In 2019, India became the largest emitter of this toxic gas.

When thermal power plants burn coal to generate electricity, sulphur mixes with oxygen to release sulphur dioxide – or SO2 – in the air. In 2019, India became the largest emitter of this toxic gas.