Global Witness has published a highly important report on the threats faced by environmental human rights defenders - those who peacefully advocate for the protection of human rights to the environment and land. The non-profit organization found 908 documented murders of environmental and land defenders from 2002 through 2013, an average of one every week.
Even worse, the number of murders has increased in recent years, and the perpetrators are only rarely arrested and tried. The report is at http://www.globalwitness.org/deadlyenvironment/