Vocab 9a part 2

An example of an -----------------------is an ecologist who studies the effects of humans on their environment.

• environmentalist

• environment

• environmental

With so little rain, everyone had to -------------- water

• conservation

• conserve

• conservationist

Firefighters wear -------------- clothing to reduce the risk of being burned.

• protection

• protected

• protective

In the past 10 years, --------------- measures have radically reduced levels of tooth decay in children.

• preventive

• prevent

• prevention

• preventable

These six ---------------- are carbon monoxide, lead, nitrogen oxides, ground-level ozone, particle pollution (often referred to as particulate matter), and sulfur oxides.

• pollution

• polluting

• pollutants

"the ozone layer blocks the ------------rays from the sun"

• harmless

• harm

• harmful

The meaning of -------------is to ruin the structure, organic existence, or condition of; also : to ruin as if by tearing to shreds.

• destroyer

• destruction

• destroy

Animals usually become -------------- because of over hunting or the destruction of their habitat.

• danger

• dangerous

• endangered

famine -------------------- the city.

• threatens

• threatening

• threat