Emissions & Energy
Energy use, specifically electricity use, is the main driver of our scope 1 and 2 GHG emissions. From 2018 to 2019, our total energy use decreased by 2%, driven by a reduction in energy derived from non-renewable energy sources. Additionally, our total GHG emissions decreased by 22%.
Our emissions and energy data from 2018 to 2019 were as follows:1
| |
2018
|
2019
|
|
Energy Use - Total (GWh) from Grid
|
8.5
|
8.3
|
|
Energy Use - Percent from Grid
|
100%
|
100%
|
|
Renewable Energy (GWh)
|
3.6
|
3.6
|
|
Renewable Energy (Percent)
|
42%
|
43%
|
|
Non-Renewable Energy (GWh)
|
4.9
|
4.7
|
|
Non-Renewable Energy (Percent)
|
58%
|
57%
|
|
C02e (Metric Tons, scope 1&2)
|
3,516
|
2,726
|
|
Scope 1
|
86
|
153
|
|
Scope 2
|
3,242
|
2,573
|
|
Other Significant Air Emissions (Tons)*
|
1.42
|
1.36
|
*Other significant air emissions include NOx, SOx, etc. and are estimated based on approximate usage of boiler and generator equipment.
Water Usage
We primarily use water for hygiene purposes and human consumption. Our water conservation efforts include low-flow bathroom facilities and reduced landscaping water needs.
Our water data from 2018 to 2019 were as follows:1
| |
2018
|
2019
|
|
Water use (million liters)
|
9.3
|
9.5
|
Waste
We started tracking total waste generated in 2019. In 2019, we achieved a 61% landfill diversion rate, with more than 99% of our waste generated being non-hazardous waste. In the last year, we have implemented measures to improve our diversion rate such as ensuring higher availability of recycling options, providing improved signage of recyclable material and donating reusable material to local causes.
Our waste data from 2018 to 2019 were as follows:1
| |
2018
|
2019
|
|
Waste water (million liters)
|
9.1
|
9.2
|
|
Non-hazardous waste (tons)
|
Not recorded
|
90
|
|
Landfill diversion rate
|
Not recorded
|
61%
|
|
Hazardous Material Waste (tons)
|
0.15
|
0.14
|
Any and all e-waste generated at Silicon Labs is disposed of in accordance with the Waste and Electronic Equipment (WEEE) Directive.
1 As of December 2019, we had two sites with headcount of greater than 100 people per site, including both full-time and contract employees: Austin and Singapore. These two offices represent a majority of our produced waste and consumed resources. Our environmental data is calculated based on the activities of these two offices.