Why science-based targets are the global gold standard for Net Zero

As sustainability commitments multiply, so does the scrutiny applied to them. Stakeholders, investors, lenders, regulators, customers, and employees are increasingly sophisticated in distinguishing between genuine decarbonisation and what has become known as greenwashing. Science-based targets exist precisely to bridge that gap: to ensure that Net Zero commitments are grounded in climate science and independently verified.

What makes a target ‘science-based’?

A science-based target is one that is aligned with the level of decarbonisation required to keep global temperature increase to well below 2°C above pre-industrial levels, with efforts to limit warming to 1.5°C, as set out in the Paris Agreement. The Science Based Targets initiative (SBTi) is the independent body responsible for verifying that corporate emissions reduction targets meet this standard.

Unlike traditional carbon offsetting, science-based targets:

• Cover all greenhouse gases, not just carbon dioxide
• Address Scope 1 (direct), Scope 2 (energy-related), and Scope 3 (value chain) emissions
• Require absolute emissions reductions, not reliance on offsets that may not deliver permanent carbon removal
• Set both near-term milestones and long-term 2050 pathways
• Are independently verified and publicly listed, giving your commitment genuine market credibility

Why traditional offsetting is no longer enough

Carbon offsetting has played an important role in raising awareness of climate issues, but it has significant limitations as a primary decarbonisation strategy. Trees planted for offsets may eventually release stored carbon. Offsetting can distract organisations from pursuing the absolute emissions reductions that are genuinely needed. And increasingly, sophisticated investors and regulators are treating offset-heavy commitments with scepticism.

Science-based targets hold organisations to a higher and more credible standard, one that the world’s financial institutions and development partners are rapidly making a prerequisite for serious engagement.

What this means for organisations in Zimbabwe

The opportunity for Zimbabwean organisations to establish genuine first-mover advantage on science-based targets is significant. Those who move early will be better positioned to access international capital, attract global partnerships, and demonstrate credible climate leadership at a time when the region’s voice on climate is increasingly important.

We know this is achievable because we have already done it. In November 2025, Tashapa guided a Zimbabwean SME to become the first organisation in the country to achieve formal SBTi Net Zero approval.