Risk vs Impact

They are different. Environmental impacts are about the changes to the environment resulting from an organization’s environmental impacts:

Risks are about the effect of uncertainty. Most of time there is no uncertainty about impacts, they are happening and predictable.
The impact is about the consequences for the environment, while the risk is about processes, products or services.

Some risks become higher when they are associated with an abnormal or emergency situation.

You can find more information below:

• Risks and opportunities in ISO 14001:2015 – What they are and why they are important - https://advisera.com/14001academy/blog/2016/03/07/risks-and-opportunities-in-iso-140012015-what-they-are-and-why-they-are-important/
• Free webinar - Free webinar - ISO 14001: Identification and evaluation of environmental aspects - https://advisera.com/14001academy/webinar/iso-14001-identification-and-evaluation-of-environmental-aspects-free-webinar-on-demand/
• ISO 14001 document template: Procedure for Identification and Evaluation of Environmental Aspects and Risks - https://advisera.com/14001academy/documentation/procedure-for-identification-and-evaluation-of-environmental-aspects/
• Enroll for free in this course – ISO 14001:2015 Lead Auditor Course - https://advisera.com/training/iso-14001-lead-auditor-course/
• Book – The ISO 14001:2015 Companion - https://advisera.com/books/the-iso-14001-2015-companion/