Carbon dioxide and carbon monoxide released in the atmosphere, produced by vehicles and industrial processes

balance of natural relationships in the environment

likely to be harmed or damaged

the variety of life in the world or in a particular habitat or ecosystem.

involving or causing sudden great damage or suffering

Chemicals used on plants that do not harm the plants, but kill pests and have negative repercussions on other species who ingest the chemicals.

grow or develop well or vigorously

The removal of trees faster than forests can replace themselves.

war, civil disasters, accidents, terrorist acts

to stop something from happening before it occurs

an effect or result, often indirect or remote, of some event or action

adj.) open to attack; capable of being wounded or damaged; unprotected