History

Water that you can drink without danger to your health

• Potable

• Brackish

• Septic tank

• Mollusc

Layer of gas that surrounds the planet and absorbs ultraviolet waves, protecting us from the sun

• Potable

• Brackish

• Ozone layer

• Ultraviolet rays

Rays released from the sun and which in large quantities harm the eye and the skin

• Potable

• Brackish

• Ozone layer

• Ultraviolet rays

Facility for storing human waste

• Potable

• Brackish

• Septic tank

• Mollusc

Invertebrate animals that are not divided with a soft body that is exposed or is protected by a shell

• Potable

• Brackish

• Septic tank

• Mollusc

To breath in

• Potable

• Brackish

• To inhale

• To exhale

To breath out gases, vapors or odors

• Potable

• Brackish

• To inhale

• To exhale

American soils can be classified into:

Some products native to American soils include:

A natural resource that can be replenished naturally over time: