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Large solar panels in a sunny vineyard at Silver Oak & Twomey Cellars, IWCA winery in California.

Reducing GHG Emissions

Reaching Net Zero in the Wine Sector

The first step in a winery's climate action strategy?

A detailed GHG emissions inventory.

With detailed inventories, wineries can identify their emissions "hotspots" and implement targeted strategies, then track their progress in achieving emissions reductions over time.

That's why one of IWCA’s driving goals is to develop and share rigorous methodologies for wineries to measure their GHG emissions. We provide our member wineries with milestones and standards to measure their emissions year over year, a foundation for them to develop their roadmap to reach Net Zero.

A blurry background photo of a vineyard at Hill-Smith Family Estates, IWCA winery in Australia. The photo is taking between rows of vines.

What are Scopes 1, 2, and 3, and why does IWCA measure all three?


A preview of IWCA's infographic about GHG emissions, which is grouped into Scopes 1, 2 and 3.

What are wineries' largest sources of greenhouse gas emissions?


GHG Hotspots Map - Nov 2023.jpg
GHG Calculators

IWCA Tools & Guidance

GHG Emissions Calculators

Screenshot preview of IWCA's greenhouse gas emissions calculator. Image shows rows in an Excel table.

To encourage widespread, high-standard, consistent GHG measurements, IWCA has developed three GHG emissions calculators for wineries based in Australia, New Zealand, and the US, using region-specific emissions factors.


They are aligned with World Resources Institute (WRI) GHG Protocols and ISO-14064 standards and cover Scopes 1, 2, and 3.


(Email address is required to access the calculators)

New Zealand calculator

US calculator

GHG Emissions Inventory Guidance

Screenshot of IWCA's GHG emissions inventory guidance. Text and tables.

IWCA's GHG Inventory Scopes Guidance Document outlines the protocols all IWCA members must follow when measuring their GHG emissions across Scopes 1, 2, and 3.

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