Reducing CO₂ emissions

Monitoring and reducing carbon emissions

In 2016, the NSG Group was responsible for emitting 4.0m tonnes of CO2. Our Scope 1 emissions from our furnaces and fuel were 3.0m tonnes. Our measured Scope 2 indirect emissions were 1.0m tonnes of CO2 and our estimated Scope 3 emissions were 0.9m tonnes. Conversion from heavy oil to natural gas has helped our float plants reduce carbon emissions by around 50 per cent over the past 40 years and a combination of design and operational innovations has made further progress. We aim to reduce CO2 emissions per tonne of equivalent product by 1 per cent per year until 2020. This target has been achieved year-on-year for the last three years.

 Year  CO2 KPI
 FY15  0.782
 FY16  0.770
 FY17  0.763

CO2 KPI is the emission of CO2 (tonnes) per tonne of equivalent product output. The equivalent tonne refers to the relative energy intensity to manufacture a product compared to a standard product.

Recycled glass to improve efficiency and reduce emissions

Wherever quality allows, we recycle any glass off-cuts or cullet within our own glass-melting lines. By doing so, we reduce the need for raw materials and close the recycling loop. Ten per cent cullet use saves three per cent furnace energy, leading to reduced CO2 emissions. One of our sites recently manufactured glass using 100 per cent cullet. Cullet return projects are ongoing to try to minimize the need for virgin raw materials. Landfill is the least favored disposal option. If glass is produced that cannot be re-melted on-site, it is sent for external recycling where practicable.