| salinization(noun, disaster, ecology, agriculture) |
| toxic waste(expression, disaster, catastrophe, ecology) |
| Kyshtym disaster(expression, catastrophe, pollution, ecology) |
| africanized bees(expression, catastrophe, pollution, ecology) |
| agricultural catastrophe(expression, problem, pollution, ecology) |
| air pollution(expression, problem, pollution, ecology) |
| bubonic plague(expression, catastrophe, pollution, ecology) |
| cadmium poisoning(expression, disaster, catastrophe, ecology) |
| contaminated soil(expression, disaster, catastrophe, ecology) |
| dioxin contamination(expression, disaster, catastrophe, ecology) |
| dirty dairying(expression, catastrophe, pollution, ecology) |
| dirty thirties(expression, catastrophe, pollution, ecology) |
| dust bowl(expression, catastrophe, pollution, ecology) |
| great sparrow campaign(expression, catastrophe, pollution, ecology) |
| industrial catastrophe(expression, problem, pollution, ecology) |
| mercury poisoning(expression, disaster, catastrophe, ecology) |
| nuclear catastrophe(expression, problem, pollution, ecology) |
| salinity(noun, disaster, ecology, agriculture) |
| shark finning(expression, catastrophe, pollution, ecology) |