This list does not pretend for any scientific method. I’ve merely hand-picked the categories into which people have put their causes on Facebook using the Causes application.
Facebook: if you can provide any further statistics, this would be helpful.
Environmental Concerns
Pollution of air, lack of clean water, and soil erosion. Depletion of natural resources such as water and oil. Decreasing quality of air. Garbage and plastic bags. Stop Climate Change. Supports causes for Solar Panels, Wind Turbines, Carbon Capture, Geothermal, and Wave power.
Social Concerns
Population Growth. Increasing hunger. Increasing poverty.
Freedom
Internet. Net neutrality. Freedom of speech. Corruption. Freedom of the press
Conflict
Nuclear prolification. Fear. War. Dislocation.
Human Rights Wish List
Equality. Minority rights. Gay rights. Abolish death penalty. Racism. Genocide prevention.
Animal and Plant life
Animal Rights / Stop Animal Cruelty. Animal Testing. Cosmetic testing. Animal welfare. Use of fur. Bull fights. Whaling. Bush meat. Diversity of Species. Endangered species. Extinsion of species. Dendrolagus matschiei. Protect wildlife. Rewildering projects.
Specific animals in Danger
Jangse river dolphin. Gorillas. Sharks. Sea Shells. Chinchillas. Philipine Eagle. Coral Reefs. Biomes.
Domestic Violence
Child abuse. Abuse of women. Domestic violence. Child pornography. Gun and knife crime. Sexual violence. Human trafficking. Child labor.