degrade

1 - Terrorism is a symptom of global insecurity brought on by poverty, disease, and environmental degradation.

2 - Degradation of cultural sites may arise from vandalism, littering, illegal removal of cultural heritage items and lack of proper protection.

3 - The natural environment, which is the home and source of water, is often destroyed by industrial pollution and degradation.

4 - From diminished air quality and degradation of food and water supplies to increasing levels of allergens and catastrophic weather events, we will experience a number of worsening health threats during our lifetimes.

5 - Experts fear that, unless significantly higher yields are achieved with genetically modified (GM) crops, massive environmental degradation will be the inevitable result of trying to feed the world's increasing population.