There are many excellent resources that provide information on environmental justice and climate change and related issues. Most of the resources mentioned here are in English.

Karen Bloomquist (ed.), God, Creation and Climate Change. Spiritual and Ethical Perspectives, LWF Studies, 2009).
A shorter version is available at,
http://www.lutheranworld.org/lwf/index.php/god-creation-climate-change.html (English and German)

The South African Council of Churches has published a statement by African church leaders to the crisis: Climate Change. A Challenge to the Churches in South Africa (2009). The full text is available at,
http://www.neccsa.org.za/documents/ClimateChange_Challenge-to-the-church-in-SA.pdf

The LWF Youth Toolkit on Climate Change ( 2009) is available at, http://www.lutheranworld.org/lwf/index.php/god-creation-climate-change.html

Christian Aid (a British agency) put together some interesting resources. At,
http://www.christianaid.org.uk/resources/campaign/index.aspx

For the most recent scientific thinking and evaluation of the situation, see the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. The Fifth Report will be published soon. At,
http://www.ipcc.ch/