Have you seen Pope Francis' statement Laudato si' published in May 2015? He argues that theists have a responsibility to humanity and to the planet, including a responsibility to address the problem of climate change, and he backs his argument with references to scripture and also to the writings of religious leaders, Christian and non-Christian. In April 2019, Greta Thunberg met the Pope and thanked him for speaking out, and he gave his blessing to her campaign. If you google words like “Pope Francis meets Greta Thunberg”, you'll find videos of their conversation on Youtube.