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via the Vatican:

Today we celebrate the fiftieth Earth Day. This is an occasion for renewing our commitment to love and care for our common home and for the weaker members of our human family. As the tragic coronavirus pandemic has taught us, we can overcome global challenges only by showing solidarity with one another and embracing the most vulnerable in our midst.…

As imago Dei, in God’s image, we are called to have care and respect for all creatures, and to offer love and compassion to our brothers and sisters, especially the most vulnerable among us, in imitation of God’s love for us, manifested in his Son Jesus, who became man in order to share our state with us and save us.

Because of our selfishness we have failed in our responsibility to be guardians and stewards of the earth. “We need only take a frank look at the facts to see that our common home is falling into serious disrepair” (ibid., 61). We have polluted it, we have despoiled it, endangering our very lives. For this reason, various international and local movements have sprung up in order to appeal to our consciences. I deeply appreciate these initiatives; still it will be necessary for our childrento take to the streets to teach us the obvious: we have no future if we destroy the very environment that sustains us….

We are aware of the importance of cooperation as an international community for the protection of our common home. I urge those in positions of leadership to guide the preparations for two important international Conferences: COP15 on Biodiversity in Kunming, China, and COP26 on Climate Change in Glasgow, United Kingdom. These two meetings are of great importance.

I would like to support concerted action also on the national and local levels. It will help if people at all levels of society come together to create a popular movement “from below”. The Earth Day we are celebrating today was itself born in precisely this way. We can each contribute in our own small way.