Hi Jennifer,
Although not specifically for CHWs, the self paced online course Climate change and public health is freely available online at https://courses.peoples-praxis.org/course/view.php?id=13 . Anyone can access as a guest or self login (which would allow participants to take a quiz and earn a certificate) is also easy. The course is published under a CC licence, so can be adapted and freely used by anyone. Happy to make any adaptations that would be useful.
Best wishes
Dick Heller
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Richard F Heller
Emeritus Professor
Universities of Manchester, UK, and Newcastle, Australia
+61(0)450449459
HIFA profile: Richard Heller is Emeritus Professor at the Universities of Newcastle, Australia and Manchester, UK. His interests are in online education and global health capacity building. Dick is the author of an open access book The Distributed University for Sustainable Higher Education. rfheller4 at gmail.com