Climate change is a problem that affects all of humankind and knows no borders. From 9 to 11 April 2019, the La Concepción Historical Botanical Garden in Malaga hosted the Technical Seminars of the Ibero-Macaronesian Association of Botanical Gardens (AIMJB), which brings together botanical gardens in Spain and Portugal, attended by around fifty people. During the seminars, it was agreed to join the Climate Change Alliance created in 2018 in Melbourne (Australia) through the so-called "Malaga Declaration", which can be viewed in the attached document, in addition to the papers presented at the event.