Business Ambition for 1.5°C

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Join the 1.5°C business leaders

‘Business Ambition for 1.5°C’ is an urgent call to action from a global coalition of UN agencies, business and industry leaders, in partnership with the Race to Zero.

We’re calling on companies to commit to set ambitious science-based emissions reduction targets.

By setting a net-zero target in line with a 1.5°C future — our only future — businesses can make their critical contribution to limiting the worst impacts of climate change.

So far, over 900 companies, representing more than US$13 trillion in market cap, have responded to the open letter from global leaders, and signed the Business Ambition for 1.5°C commitment.

1.5°C #OurOnlyFuture
965 companies committed

Why 1.5°C?

To hold off some of the worst climate impacts, and avoid irreversible damage to our societies, economies and the natural world, we must hold temperature rise to 1.5°C above pre-industrial levels. This requires halving greenhouse gas emissions by 2030 and hitting net-zero emissions by 2050.

That’s why we are inviting visionary business leaders to publicly commit their companies to a net-zero, 1.5°C target and be recognized in the lead up to COP 26 in November 2021. Leading companies are already proving that a 1.5°C-compliant business model is possible, and there is evidence that these companies will be best-placed to thrive as the global economy undergoes a just transition to a net-zero future by 2050.

Your leadership on climate action starts here.

Learn more

For companies with existing SBTs, we invite you to voluntarily boost the ambition level of your current targets and align your scopes 1 and 2 ambition, along with scope 3 where relevant, with a 1.5°C pathway. Learn more.

The SBTi reserves the right to carry out due diligence reviews before accepting signed commitment letters. This applies to all SBTi commitments including those received through the Business Ambition for 1.5°C campaign.

Frequently asked questions

Join the business leaders taking ambitious climate action

COMMIT Submit a signed Business Ambition for 1.5°C commitment letter
DEVELOP Work on an emissions reduction target in line with the SBTi’s criteria
SUBMIT Present your target to the SBTi for official validation
COMMUNICATE Announce your target and inform your stakeholders
DISCLOSE Report company-wide emissions and progress against targets on an annual basis

Partners and Supporters

Business Ambition for 1.5°C is a campaign led by the Science Based Targets initiative in partnership with the UN Global Compact and the We Mean Business coalition. It was launched in 2019 by a global coalition of UN agencies, business and industry leaders.

Latest News

Policy priorities and approach

As businesses, now is the time to maximize your voice in the markets you operate and call on governments to provide you with the clarity and confidence you need to unlock further investments in climate solutions.

Read our new guide on policy advocacy for businesses taking climate action.

Uniting business and governments to recover better

A statement from companies in the SBTi and its Business Ambition for 1.5°C campaign.


In 2017, we became the first company globally to set new, science-based targets in line with the 1.5 degree trajectory recommended in the Paris Climate Accord. Jason Tarry Tesco UK and ROI CEO