The United Nations Climate Change Conference is being held in Peru between December 1-12.
World leaders will gather in Lima to make commitments and draft and agreement on the ways they will cut their greenhouse gas emissions by 2020, before a definitive treaty is made in Paris next year.
Last month the U.S. pledged to cut its greenhouse-gas emissions by 26 to 28 percent by 2015 while China promised to begin reducing its emissions by 2030.
It's been seen as a positive sign that some of the world's top polluters are willing to find a new deal.
Christian charity Tearfund is hopeful an agreement will be found.
Senior Advocacy Associate Ben Niblett tells Premier: "The impact of climate change is one of the greatest injustices of our time.
"Poorer countries produce a tiny fraction of the greenhouse gases that rich countries produce yet we know that the impacts are being felt the most by them.
"All the development efforts we have made in the past could be for nothing if we don't the address the fundamental ways we use our planet, and how it is contributing to the changing climate.
"The church has always been at the forefront of change. We need to help people in rich countries consume less and consume differently so that the poorest people don't miss out, and campaign for governments action on climate change. And we follow a God who is bigger than us, so we're hopeful."